Azure Linux 3.0 安全更新hyperv-daemons (CVE-2024-35794)
medium Nessus 插件 ID 295861
语言：
简介
远程 Azure Linux 主机缺少一个或多个安全更新。描述
远程 Azure Linux 3.0 主机上安装的 hyperv-daemons 版本低于 测试的 版本。因此，该程序受到 CVE-2024-35794 公告中提及的一个漏洞影响。- 已修复 Linux 内核中的下列漏洞：dm-raid: really frozen sync_thread during suspend 1) commit f52f5c71f3d4 (md: fix stopping sync thread) remove MD_RECOVERY_FROZEN from
__md_stop_writes() and doesn't realize that dm-raid relies on __md_stop_writes() to frozen sync_thread indirectly. Fix this problem by adding MD_RECOVERY_FROZEN in md_stop_writes(), and since stop_sync_thread() is only used for dm-raid in this case, also move stop_sync_thread() to md_stop_writes(). 2) The flag MD_RECOVERY_FROZEN doesn't mean that sync thread is frozen, it only prevent new sync_thread to start, and it can't stop the running sync thread; In order to frozen sync_thread, after seting the flag, stop_sync_thread() should be used. 3) The flag MD_RECOVERY_FROZEN doesn't mean that writes are stopped, use it as condition for md_stop_writes() in raid_postsuspend() doesn't look correct.
Consider that reentrant stop_sync_thread() do nothing, always call md_stop_writes() in raid_postsuspend().
4) raid_message can set/clear the flag MD_RECOVERY_FROZEN at anytime, and if MD_RECOVERY_FROZEN is cleared while the array is suspended, new sync_thread can start unexpected. Fix this by disallow raid_message() to change sync_thread status during suspend. Note that after commit f52f5c71f3d4 (md: fix stopping sync thread), the test shell/lvconvert-raid-reshape.sh start to hang in stop_sync_thread(), and with previous fixes, the test won't hang there anymore, however, the test will still fail and complain that ext4 is corrupted. And with this patch, the test won't hang due to stop_sync_thread() or fail due to ext4 is corrupted anymore. However, there is still a deadlock related to dm-raid456 that will be fixed in following patches. (CVE-2024-35794)
请注意，Nessus 尚未测试此问题，而是只依据应用程序自我报告的版本号进行判断。
解决方案
更新受影响的程序包。另见
插件详情
严重性: Medium
ID: 295861
文件名: azure_linux_CVE-2024-35794.nasl
版本: 1.1
类型: local
发布时间: 2026/1/22
最近更新时间: 2026/1/22
支持的传感器: Nessus
风险信息
VPR
风险因素: Medium
分数: 4.4
CVSS v2
风险因素: Medium
基本分数: 4.6
时间分数: 3.4
矢量: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C
CVSS 分数来源: CVE-2024-35794
CVSS v3
风险因素: Medium
基本分数: 5.5
时间分数: 4.8
矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
时间矢量: CVSS:3.0/E:U/RL:O/RC:C
漏洞信息
CPE: p-cpe:/a:microsoft:azure_linux:hypervvssd, p-cpe:/a:microsoft:azure_linux:hyperv-tools, p-cpe:/a:microsoft:azure_linux:hyperv-daemons-debuginfo, p-cpe:/a:microsoft:azure_linux:hyperv-daemons-license, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:hypervfcopyd, p-cpe:/a:microsoft:azure_linux:hypervkvpd, p-cpe:/a:microsoft:azure_linux:hyperv-daemons
必需的 KB 项: Host/local_checks_enabled, Host/AzureLinux/release, Host/AzureLinux/rpm-list, Host/cpu
易利用性: No known exploits are available
补丁发布日期: 2024/9/10
漏洞发布日期: 2024/5/17
参考资料信息
CVE: CVE-2024-35794