CentOS Linux 7 [TuxCare] 安全性更新：bpftool / kernel / kernel-debug / kernel-debug-devel / kernel-devel / etc 多個弱點 （CENTOS7：CLSA-2024：1725389829）
high Nessus Plugin ID 352756
語言:
概要
CentOS Linux 主機缺少一個或多個安全性更新。說明
CentOS Linux 7 主機已安裝的套件會受到 TuxCare CENTOS7：CLSA-2024：1725389829 公告中提及的多個弱點影響。- Linux 磁碟/網卡前端資料洩漏 [此 CNA 資訊記錄與多個 CVE 有關；本文說明了哪些方面/弱點與哪些 CVE 對應。] Linux Block 和 Network PV 裝置前端未將記憶體區域歸零便將之與後端共用 (CVE-2022-26365、CVE-2022-33740)。
此外，授權表格的粒度不允許共用小於 4K 的頁面，這導致無關資料會保留於相同的 4K 頁面中，這是因爲與後端共用的資料也可以被此後端存取 (CVE-2022-33741、CVE-2022-33742)。(CVE-2022-33742)
- 已解決 Linux 核心中的下列弱點：net: fix out-of-bounds access in ops_init net_alloc_generic is called by net_alloc, which is called without any locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It is read twice, first to allocate an array, then to set s.len, which is later used to limit the bounds of the array access. It is possible that the array is allocated and another thread is registering a new pernet ops, increments max_gen_ptrs, which is then used to set s.len with a larger than allocated length for the variable array. Fix it by reading max_gen_ptrs only once in net_alloc_generic. If max_gen_ptrs is later incremented, it will be caught in net_assign_generic. (CVE-2024-36883)
- 已解決 Linux 核心中的下列弱點：ALSA: Fix deadlocks with kctl removals at disconnection In snd_card_disconnect(), we set card->shutdown flag at the beginning, call callbacks and do sync for card->power_ref_sleep waiters at the end. The callback may delete a kctl element, and this can lead to a deadlock when the device was in the suspended state. Namely: * A process waits for the power up at snd_power_ref_and_wait() in snd_ctl_info() or read/write() inside card->controls_rwsem. * The system gets disconnected meanwhile, and the driver tries to delete a kctl via snd_ctl_remove*(); it tries to take card->controls_rwsem again, but this is already locked by the above. Since the sleeper isn't woken up, this deadlocks. An easy fix is to wake up sleepers before processing the driver disconnect callbacks but right after setting the card->shutdown flag. Then all sleepers will abort immediately, and the code flows again. So, basically this patch moves the wait_event() call at the right timing. While we're at it, just to be sure, call wait_event_all() instead of wait_event(), although we don't use exclusive events on this queue for now. (CVE-2024-38600)
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。
解決方案
根據 TuxCare 公告 CENTOS7：CLSA-2024：1725389829 中的指引更新受影響的套件。另請參閱
Plugin 詳細資訊
嚴重性: High
ID: 352756
檔案名稱: tuxcare_centos_7_CLSA-2024-1725389829.nasl
版本: 1.1
類型: Local
代理程式: unix
已發布: 2026/9/30
已更新: 2026/9/30
支援的感應器: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
風險資訊
VPR
風險因素: Medium
分數: 6.3
百分位數: 96.43
Vendor
Vendor Severity: Important
CVSS v2
風險因素: Low
基本分數: 3.6
時間性分數: 2.7
媒介: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:P
CVSS 評分資料來源: CVE-2022-33742
CVSS v3
風險因素: High
基本分數: 7.1
時間性分數: 6.2
媒介: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
時間媒介: CVSS:3.0/E:U/RL:O/RC:C
CVSS 評分資料來源: CVE-2024-36883
弱點資訊
必要的 KB 項目: Host/OS/extended-third-party, Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
可輕鬆利用: No known exploits are available
修補程式發佈日期: 2024/9/3
弱點發布日期: 2021/7/21
參考資訊
CVE: CVE-2022-33742, CVE-2024-36883, CVE-2024-38600
CLSA: 2024:1725389829