遠端 Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 主機上安裝的套件受到 USN-6587-1 公告中所提及的多個弱點影響。

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2024:2170 advisory.

    Xwayland is an X server for running X clients under Wayland.

    Security Fix(es):

    * xorg-x11-server: Out-of-bounds write in XIChangeDeviceProperty/RRChangeOutputProperty (CVE-2023-5367)

    * xorg-x11-server: out-of-bounds memory reads/writes in XKB button actions (CVE-2023-6377)

    * xorg-x11-server: out-of-bounds memory read in RRChangeOutputProperty and RRChangeProviderProperty     (CVE-2023-6478)

    * xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer (CVE-2023-6816)

    * xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access     (CVE-2024-0229)

    * xorg-x11-server: SELinux unlabeled GLX PBuffer (CVE-2024-0408)

    * xorg-x11-server: SELinux context corruption (CVE-2024-0409)

    * xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent (CVE-2024-21885)

    * xorg-x11-server: heap buffer overflow in DisableDevice (CVE-2024-21886)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.4 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3721 advisory.

  - A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for     each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the     X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap     overflow if a bigger value was used. (CVE-2023-6816)

  - A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the     buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a     GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the     XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
    (CVE-2024-0408)

  - A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of     private at creation. It uses the cursor bits type with the cursor as private, and when initiating the     cursor, that overwrites the XSELINUX context. (CVE-2024-0409)

  - The X.Org project reports: Both DeviceFocusEvent and the XIQueryPointer reply contain a bit     for each logical button currently down. Buttons can be arbitrarily             mapped to any value up to     255 but the X.Org Server was only             allocating space for the device's number of buttons,     leading to a heap overflow if a bigger value was used. If a device has both a button class and a key class     and             numButtons is zero, we can get an out-of-bounds write due             to event under-     allocation in the DeliverStateNotifyEvent             function. The XISendDeviceHierarchyEvent() function     allocates space to             store up to MAXDEVICES (256) xXIHierarchyInfo structures in info.
    If a device with a given ID was removed and a new device with             the same ID added both in the     same operation,             the single device ID will lead to two info structures being     written to info.             Since this case can occur for every device ID at once,             a total of     two times MAXDEVICES info structures might be written             to the allocation, leading to a heap     buffer overflow. The DisableDevice() function is called whenever an enabled device             is disabled     and it moves the device from the inputInfo.devices             linked list to the inputInfo.off_devices     linked list.             However, its link/unlink operation has an issue during the recursive     call to DisableDevice() due to the prev pointer pointing to a             removed device.             This     issue leads to a length mismatch between the total number of             devices and the number of device     in the list, leading to a heap             overflow and, possibly, to local privilege escalation.
    (CVE-2024-0229, CVE-2024-21885, CVE-2024-21886)

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2024-522 advisory.

  - A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to     a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or     possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)

  - A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or     RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive     information. (CVE-2023-6478)

  - A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for     each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the     X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap     overflow if a bigger value was used. (CVE-2023-6816)

  - An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a     device frozen by a sync grab is reattached to a different master device. This issue may lead to an     application crash, local privilege escalation (if the server runs with extended privileges), or remote     code execution in SSH X11 forwarding environments. (CVE-2024-0229)

  - A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the     buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a     GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the     XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
    (CVE-2024-0408)

  - A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of     private at creation. It uses the cursor bits type with the cursor as private, and when initiating the     cursor, that overwrites the XSELINUX context. (CVE-2024-0409)

  - A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to     a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or     possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377) (CVE-2024-21885,     CVE-2024-21886)

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 xorg-x11-server package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to     a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or     possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)

  - A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or     RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive     information. (CVE-2023-6478)

  - A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for     each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the     X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap     overflow if a bigger value was used. (CVE-2023-6816)

  - An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a     device frozen by a sync grab is reattached to a different master device. This issue may lead to an     application crash, local privilege escalation (if the server runs with extended privileges), or remote     code execution in SSH X11 forwarding environments. (CVE-2024-0229)

  - A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the     buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a     GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the     XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
    (CVE-2024-0408)

  - A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of     private at creation. It uses the cursor bits type with the cursor as private, and when initiating the     cursor, that overwrites the XSELINUX context. (CVE-2024-0409)

  - A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the     allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can     trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution     in SSH X11 forwarding environments. (CVE-2024-21885)

  - A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may     lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding     environments. (CVE-2024-21886)

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.

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0320 advisory.

  - A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for     each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the     X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap     overflow if a bigger value was used. (CVE-2023-6816)

  - The X.Org project reports: Both DeviceFocusEvent and the XIQueryPointer reply contain a bit     for each logical button currently down. Buttons can be arbitrarily             mapped to any value up to     255 but the X.Org Server was only             allocating space for the device's number of buttons,     leading to a heap overflow if a bigger value was used. If a device has both a button class and a key class     and             numButtons is zero, we can get an out-of-bounds write due             to event under-     allocation in the DeliverStateNotifyEvent             function. The XISendDeviceHierarchyEvent() function     allocates space to             store up to MAXDEVICES (256) xXIHierarchyInfo structures in info.
    If a device with a given ID was removed and a new device with             the same ID added both in the     same operation,             the single device ID will lead to two info structures being     written to info.             Since this case can occur for every device ID at once,             a total of     two times MAXDEVICES info structures might be written             to the allocation, leading to a heap     buffer overflow. The DisableDevice() function is called whenever an enabled device             is disabled     and it moves the device from the inputInfo.devices             linked list to the inputInfo.off_devices     linked list.             However, its link/unlink operation has an issue during the recursive     call to DisableDevice() due to the prev pointer pointing to a             removed device.             This     issue leads to a length mismatch between the total number of             devices and the number of device     in the list, leading to a heap             overflow and, possibly, to local privilege escalation.
    (CVE-2024-0229, CVE-2024-21885, CVE-2024-21886)

  - A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the     buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a     GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the     XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
    (CVE-2024-0408)

  - A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of     private at creation. It uses the cursor bits type with the cursor as private, and when initiating the     cursor, that overwrites the XSELINUX context. (CVE-2024-0409)

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

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6587-1 advisory.

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

ID	名稱	產品	系列	已發布	已更新	嚴重性
189087	Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10：X.Org X Server 弱點 (USN-6587-1)	Nessus	Ubuntu Local Security Checks	2024/1/16	2024/1/29	critical
194793	RHEL 9 : xorg-x11-server-Xwayland (RHSA-2024:2170)	Nessus	Red Hat Local Security Checks	2024/4/30	2024/6/3	critical
189604	Debian dla-3721 : xdmx - security update	Nessus	Debian Local Security Checks	2024/1/25	2024/1/29	critical
190736	Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2024-522)	Nessus	Amazon Linux Local Security Checks	2024/2/20	2024/2/20	critical
191800	EulerOS 2.0 SP11 : xorg-x11-server (EulerOS-SA-2024-1232)	Nessus	Huawei Local Security Checks	2024/3/12	2024/3/12	critical
191838	EulerOS 2.0 SP11 : xorg-x11-server (EulerOS-SA-2024-1254)	Nessus	Huawei Local Security Checks	2024/3/12	2024/3/12	critical
191980	EulerOS 2.0 SP10 : xorg-x11-server (EulerOS-SA-2024-1330)	Nessus	Huawei Local Security Checks	2024/3/12	2024/3/12	critical
189284	CentOS 7 : xorg-x11-server (RHSA-2024:0320)	Nessus	CentOS Local Security Checks	2024/1/22	2024/1/29	critical
189087	Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : X.Org X Server vulnerabilities (USN-6587-1)	Nessus	Ubuntu Local Security Checks	2024/1/16	2024/1/29	critical

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