SUSE Linux Enterprise 12 SP5カーネルが更新され、さまざまなセキュリティとバグの修正が行われています。

以下のセキュリティバグが修正されました。

CVE-2021-3347：障害処理中にPI futexにUse-After-Freeが検出され、ローカルユーザーがカーネルでコードを実行できます（bnc#1181349）。

CVE-2021-20177：iptables文字列一致ルールに関連するカーネルパニックを修正しました。権限のあるユーザーが、サービス拒否につながるルールを挿入する可能性があります（bnc#1180765）。

CVE-2021-0342：tun.cのtun_get_userで、メモリ解放後使用（Use-After-Free）によるメモリ破損の可能性があります。これにより、システム実行権限が必要なローカルでの権限昇格が引き起こされる可能性があります。
（bnc#1180812）

CVE-2020-27835：特にユーザーがdevファイルとforkを開いた後にIoctlを呼び出す方法において、infiniband hfi1ドライバーのUse-After-Freeが見つかりました。ローカルユーザーがこの欠陥を使用して、システムをクラッシュさせる可能性があります（bnc#1179878）。

CVE-2020-25639：nouveau ioctlによるNULLポインターデリファレンスを修正しました（bnc#1176846）。

CVE-2020-29569：Xenで使用されているPVブロックバックエンドに関連する潜在的な権限昇格と情報漏洩を修正しました（bnc#1179509）。

CVE-2020-29568：監視イベントの処理に関連するサービス拒否の問題を修正しました（bnc#1179508）。

CVE-2020-25211：ローカルの攻撃者がconntrack netlink構成を挿入して、サービス拒否を引き起こしたり、ctnetlink_parse_tuple_filterでの不適切なプロトコル番号の使用をトリガーしたりする可能性がある欠陥を修正しました（bnc#1176395）。

更新パッケージには、セキュリティ関連以外の修正も含まれています。詳細については、アドバイザリを参照してください。

注意：Tenable Network Securityは、前述の記述ブロックをSUSEセキュリティアドバイザリから直接抽出しています。Tenableでは、そこに新しい問題を追加することはせずに、できる限り自動的に整理と書式設定をするようにしています。

The SUSE Linux Enterprise 12 SP5 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).

CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).

CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required.
(bnc#1180812)

CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).

CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).

CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).

CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 12 SP3 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).

CVE-2020-25211: Fixed a buffer overflow in ctnetlink_parse_tuple_filter() which could be triggered by a local attackers by injecting conntrack netlink configuration (bnc#1176395).

CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).

CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).

CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).

CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).

CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).

CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).

CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).

CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).

CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).

CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).

CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).

CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).

CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).

CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).

CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).

CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).

CVE-2020-15437: Fixed a NULL pointer dereference which could have allowed local users to cause a denial of service(bsc#1179140).

CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).

CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).

CVE-2020-25285: Fixed a race condition between hugetlb sysctl handlers in mm/hugetlb.c (bnc#1176485).

CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).

CVE-2018-10902: It was found that the raw midi kernel driver did not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation (bnc#1105322).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

CVE-2020-27815

A flaw was reported in the JFS filesystem code allowing a local attacker with the ability to set extended attributes to cause a denial of service.

CVE-2020-27825

Adam 'pi3' Zabrocki reported a use-after-free flaw in the ftrace ring buffer resizing logic due to a race condition, which could result in denial of service or information leak.

CVE-2020-27830

Shisong Qin reported a NULL pointer dereference flaw in the Speakup screen reader core driver.

CVE-2020-28374

David Disseldorp discovered that the LIO SCSI target implementation performed insufficient checking in certain XCOPY requests. An attacker with access to a LUN and knowledge of Unit Serial Number assignments can take advantage of this flaw to read and write to any LIO backstore, regardless of the SCSI transport settings.

CVE-2020-29568 (XSA-349)

Michael Kurth and Pawel Wieczorkiewicz reported that frontends can trigger OOM in backends by updating a watched path.

CVE-2020-29569 (XSA-350)

Olivier Benjamin and Pawel Wieczorkiewicz reported a use-after-free flaw which can be triggered by a block frontend in Linux blkback. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend.

CVE-2020-29660

Jann Horn reported a locking inconsistency issue in the tty subsystem which may allow a local attacker to mount a read-after-free attack against TIOCGSID.

CVE-2020-29661

Jann Horn reported a locking issue in the tty subsystem which can result in a use-after-free. A local attacker can take advantage of this flaw for memory corruption or privilege escalation.

CVE-2020-36158

A buffer overflow flaw was discovered in the mwifiex WiFi driver which could result in denial of service or the execution of arbitrary code via a long SSID value.

CVE-2021-3347

It was discovered that PI futexes have a kernel stack use-after-free during fault handling. An unprivileged user could use this flaw to crash the kernel (resulting in denial of service) or for privilege escalation.

CVE-2021-20177

A flaw was discovered in the Linux implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) can take advantage of this flaw to cause a kernel panic when inserting iptables rules.

For Debian 9 stretch, these problems have been fixed in version 4.19.171-2~deb9u1.

We recommend that you upgrade your linux-4.19 packages.

For the detailed security status of linux-4.19 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/linux-4.19

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9038 advisory.

    - netfilter: add and use nf_hook_slow_list() (Florian Westphal)  [Orabug: 32372530]  {CVE-2021-20177}
    - target: fix XCOPY NAA identifier lookup (David Disseldorp)  [Orabug: 32248035]  {CVE-2020-28374}
    - mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start (Zhang Xiaohui)  [Orabug:
    32349203]  {CVE-2020-36158}
    - tty: Fix ->session locking (Jann Horn)  [Orabug: 32266677]  {CVE-2020-29660}
    - tty: Fix ->pgrp locking in tiocspgrp() (Jann Horn)  [Orabug: 32266677]  {CVE-2020-29660}
    - xen-blkback: set ring->xenblkd to NULL after kthread_stop() (Pawel Wieczorkiewicz)  [Orabug: 32260252]     {CVE-2020-29569}
    - xenbus/xenbus_backend: Disallow pending watch messages (SeongJae Park)  [Orabug: 32253409]     {CVE-2020-29568}
    - xen/xenbus: Count pending messages for each watch (SeongJae Park)  [Orabug: 32253409]  {CVE-2020-29568}
    - xen/xenbus/xen_bus_type: Support will_handle watch callback (SeongJae Park)  [Orabug: 32253409]     {CVE-2020-29568}
    - xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path() (SeongJae Park)  [Orabug:
    32253409]  {CVE-2020-29568}
    - xen/xenbus: Allow watches discard events before queueing (SeongJae Park)  [Orabug: 32253409]     {CVE-2020-29568}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 4.14.214-160.339. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1588 advisory.

  - In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and     then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c.
    This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in     fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c. (CVE-2019-19813)

  - In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can     cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for     the number of data stripes is mishandled. (CVE-2019-19816)

  - An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are     processing watch events using a single thread. If the events are received faster than the thread is able     to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the     backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable. (CVE-2020-29568)

  - An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux     kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped.
    However, the handler may not have time to run if the frontend quickly toggles between the states connect     and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving     guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege     escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
    (CVE-2020-29569)

  - A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID,     aka CID-c8bcd9c5be24. (CVE-2020-29660)

  - A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.
    (CVE-2020-29661)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 4.14.214-118.339. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2021-1477 advisory.

  - In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and     then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c.
    This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in     fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c. (CVE-2019-19813)

  - In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can     cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for     the number of data stripes is mishandled. (CVE-2019-19816)

  - An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are     processing watch events using a single thread. If the events are received faster than the thread is able     to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the     backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable. (CVE-2020-29568)

  - An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux     kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped.
    However, the handler may not have time to run if the frontend quickly toggles between the states connect     and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving     guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege     escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
    (CVE-2020-29569)

  - A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID,     aka CID-c8bcd9c5be24. (CVE-2020-29660)

  - A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.
    (CVE-2020-29661)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2021-9025 advisory.

    [4.14.35-2025.404.1.2.el7]
    - Revert 'rds: Deregister all FRWR mr with free_mr' (aru kolappan)  [Orabug:
      32426280]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9023 advisory.

    [4.14.35-2025.404.1.2]
    - Revert 'rds: Deregister all FRWR mr with free_mr' (aru kolappan)  [Orabug: 32426280]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the linux package has been released.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9005 advisory.

    - target: fix XCOPY NAA identifier lookup (David Disseldorp)  [Orabug: 32248040]  {CVE-2020-28374}
    - xenbus/xenbus_backend: Disallow pending watch messages (SeongJae Park)  [Orabug: 32253412]     {CVE-2020-29568}
    - xen/xenbus: Count pending messages for each watch (SeongJae Park)  [Orabug: 32253412]  {CVE-2020-29568}
    - xen/xenbus/xen_bus_type: Support will_handle watch callback (SeongJae Park)  [Orabug: 32253412]     {CVE-2020-29568}
    - xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path() (SeongJae Park)  [Orabug:
    32253412]  {CVE-2020-29568}
    - xen/xenbus: Allow watches discard events before queueing (SeongJae Park)  [Orabug: 32253412]     {CVE-2020-29568}
    - xen-blkback: set ring->xenblkd to NULL after kthread_stop() (Pawel Wieczorkiewicz)  [Orabug: 32260256]     {CVE-2020-29569}
    - mm: thp: make the THP mapcount atomic against __split_huge_pmd_locked() (Andrea Arcangeli)  [Orabug:
    32212583]  {CVE-2020-29368}
    - perf/core: Fix race in the perf_mmap_close() function (Jiri Olsa)  [Orabug: 32233358]  {CVE-2020-14351}
    - icmp: randomize the global rate limiter (Eric Dumazet)  [Orabug: 32227961]  {CVE-2020-25705}
    - Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts (Peilin Ye)  [Orabug: 32176263]     {CVE-2020-28915}
    - fbdev, newport_con: Move FONT_EXTRA_WORDS macros into linux/font.h (Peilin Ye)  [Orabug: 32176263]     {CVE-2020-28915}
    - block: Fix use-after-free in blkdev_get() (Jason Yan)  [Orabug: 32194608]  {CVE-2020-15436}
    - serial: 8250: fix null-ptr-deref in serial8250_start_tx() (Yang Yingliang)  [Orabug: 32194712]     {CVE-2020-15437}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9007 advisory.

    - xen-blkback: set ring->xenblkd to NULL after kthread_stop() (Pawel Wieczorkiewicz)  [Orabug: 32260252]     {CVE-2020-29569}
    - xenbus/xenbus_backend: Disallow pending watch messages (SeongJae Park)  [Orabug: 32253409]     {CVE-2020-29568}
    - xen/xenbus: Count pending messages for each watch (SeongJae Park)  [Orabug: 32253409]  {CVE-2020-29568}
    - xen/xenbus/xen_bus_type: Support will_handle watch callback (SeongJae Park)  [Orabug: 32253409]     {CVE-2020-29568}
    - xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path() (SeongJae Park)  [Orabug:
    32253409]  {CVE-2020-29568}
    - xen/xenbus: Allow watches discard events before queueing (SeongJae Park)  [Orabug: 32253409]     {CVE-2020-29568}
    - target: fix XCOPY NAA identifier lookup (David Disseldorp)  [Orabug: 32248035]  {CVE-2020-28374}
    - futex: Fix inode life-time issue (Peter Zijlstra)  [Orabug: 32233515]  {CVE-2020-14381}
    - perf/core: Fix race in the perf_mmap_close() function (Jiri Olsa)  [Orabug: 32233352]  {CVE-2020-14351}
    - icmp: randomize the global rate limiter (Eric Dumazet)  [Orabug: 32227958]  {CVE-2020-25705}
    - vt: Disable KD_FONT_OP_COPY (Daniel Vetter)  [Orabug: 32187738]  {CVE-2020-28974}
    - Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts (Peilin Ye)  [Orabug: 32176254]     {CVE-2020-28915}
    - fbdev, newport_con: Move FONT_EXTRA_WORDS macros into linux/font.h (Peilin Ye)  [Orabug: 32176254]     {CVE-2020-28915}
    - xen/events: block rogue events for some time (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/events: defer eoi in case of excessive number of events (Juergen Gross)  [Orabug: 32177535]     {CVE-2020-27673}
    - xen/events: use a common cpu hotplug hook for event channels (Juergen Gross)  [Orabug: 32177535]     {CVE-2020-27673}
    - xen/events: switch user event channels to lateeoi model (Juergen Gross)  [Orabug: 32177535]     {CVE-2020-27673}
    - xen/pciback: use lateeoi irq binding (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/pvcallsback: use lateeoi irq binding (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/scsiback: use lateeoi irq binding (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/netback: use lateeoi irq binding (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/blkback: use lateeoi irq binding (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/events: add a new 'late EOI' evtchn framework (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/events: fix race in evtchn_fifo_unmask() (Juergen Gross)  [Orabug: 32177535]  {CVE-2020-27673}
    - xen/events: add a proper barrier to 2-level uevent unmasking (Juergen Gross)  [Orabug: 32177535]     {CVE-2020-27673}
    - perf/core: Fix a memory leak in perf_event_parse_addr_filter() (kiyin())  [Orabug: 32131172]     {CVE-2020-25704}
    - vt: keyboard, extend func_buf_lock to readers (Jiri Slaby)  [Orabug: 32122948]  {CVE-2020-25656}
    - vt: keyboard, simplify vt_kdgkbsent (Jiri Slaby)  [Orabug: 32122948]  {CVE-2020-25656}
    - tty: make FONTX ioctl use the tty pointer they were actually passed (Linus Torvalds)  [Orabug: 32122725]     {CVE-2020-25668}
    - Bluetooth: A2MP: Fix not initializing all members (Luiz Augusto von Dentz)  [Orabug: 32021285]     {CVE-2020-12352}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database     (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
    (CVE-2020-26541)

  - An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux     kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped.
    However, the handler may not have time to run if the frontend quickly toggles between the states connect     and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving     guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege     escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
    (CVE-2020-29569)

  - In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This     could lead to local escalation of privilege with System execution privileges needed. User interaction is     not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References:
    Upstream kernel (CVE-2021-0920)

  - In ion_dma_buf_end_cpu_access and related functions of ion.c, there is a possible way to corrupt memory     due to a use after free. This could lead to local escalation of privilege with no additional execution     privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android     kernelAndroid ID: A-187527909References: Upstream kernel (CVE-2021-0929)

  - In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This     could lead to local escalation of privilege with System execution privileges needed. User interaction is     not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154177719References:
    Upstream kernel (CVE-2021-0941)

  - A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket     file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race     condition. This flaw allows a local user to crash the system or escalate their privileges on the system.
    This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名稱	產品	系列	已發布	已更新	嚴重性
146359	SUSE SLES12セキュリティ更新プログラム：カーネル（SUSE-SU-2021:0353-1）	Nessus	SuSE Local Security Checks	2021/2/10	2024/1/22	high
146359	SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0353-1)	Nessus	SuSE Local Security Checks	2021/2/10	2024/1/22	high
146511	SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0452-1)	Nessus	SuSE Local Security Checks	2021/2/16	2023/2/9	critical
146512	Debian DLA-2557-1 : linux-4.19 security update	Nessus	Debian Local Security Checks	2021/2/16	2024/1/22	high
148550	Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9038)	Nessus	Oracle Linux Local Security Checks	2021/4/14	2024/10/22	high
145456	Amazon Linux 2 : kernel (ALAS-2021-1588)	Nessus	Amazon Linux Local Security Checks	2021/1/26	2022/5/11	high
145458	Amazon Linux AMI : kernel (ALAS-2021-1477)	Nessus	Amazon Linux Local Security Checks	2021/1/26	2022/5/11	high
146047	Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9025)	Nessus	Oracle Linux Local Security Checks	2021/2/1	2024/10/22	high
145700	Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9023)	Nessus	Oracle Linux Local Security Checks	2021/1/30	2024/10/22	high
144898	Photon OS 2.0: Linux PHSA-2021-2.0-0310	Nessus	PhotonOS Local Security Checks	2021/1/13	2024/7/22	high
144902	Photon OS 3.0: Linux PHSA-2021-3.0-0182	Nessus	PhotonOS Local Security Checks	2021/1/13	2024/7/24	high
144904	Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9005)	Nessus	Oracle Linux Local Security Checks	2021/1/13	2024/10/22	high
144906	Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9007)	Nessus	Oracle Linux Local Security Checks	2021/1/13	2024/10/22	high
158524	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2022-1292)	Nessus	Huawei Local Security Checks	2022/3/2	2023/4/25	high

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