KnowSafe 安全预警:KnowSafe 安全团队监测到编号 AVD-2021-3759 的安全漏洞(危害等级:高危)已公开披露,相关用户应尽快排查并完成修复。
漏洞介绍
A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores. This flaw allows a local user to starve the resources, causing a denial of service. The highest threat from this vulnerability is to system availability.
影响范围
系统:alibaba_cloud_linux_2.1903 kernel(影响面 Up to (excluding) 4.19.91-28.1.al7)
系统:alibaba_cloud_linux_3 kernel(影响面 Up to (excluding) 5.10.134-14.al8)
系统:alma_linux_8 kernel(影响面 Up to (excluding) 4.18.0-372.9.1.el8)
系统:amazon_2 kernel(影响面 Up to (excluding) 5.10.155-138.670.amzn2)
系统:anolis_os_23 kernel(影响面 Up to (excluding) 5.10)
系统:anolis_os_7 kernel(影响面 Up to (excluding) 4.19)
系统:anolis_os_8 kernel(影响面 Up to (excluding) 5.10)
系统:debian_10 linux-5.10(影响面 Up to (excluding) 5.10.158-2~deb10u1)
……另有 18 项受影响环境,详见官方公告
解决方案
建议您更新当前系统或软件至最新版,完成漏洞的修复。
参考信息
https://access.redhat.com/security/cve/CVE-2021-3759
https://bugzilla.redhat.com/show_bug.cgi?id=1999675
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html
https://lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive%40gmail.com/
KnowSafe 将持续跟踪该漏洞的利用情况与修复进展,如需漏洞管理与应急响应支持,欢迎联系 KnowSafe 安全团队。