Debian DLA-2713-1：linux - LTS 安全更新
high Nessus 插件 ID 151891
语言：
简介
远程 Debian 主机上缺少一个或多个与安全性相关的更新。描述
远程 Debian 9 主机上安装的多个程序包受到 dla-2713 公告中提及的多个漏洞影响。- 在 5.13.4 之前的 Linux 内核 3.16 至 5.13.x 中，fs/seq_file.c 未正确限制 seq 缓冲区分配，导致整数溢出、越界写入和无特权用户提升至 root 权限，又称为 CID-8cae8cd89f05。(CVE-2021-33909)
- Linux 内核 5.12.10 及之前版本中的 net/can/bcm.c 允许本地用户从内核堆栈内存获取敏感信息，这是部分数据结构未初始化所致。(CVE-2021-34693)
请注意，Nessus 尚未测试此问题，而是只依靠应用程序自我报告的版本号来判断。
解决方案
升级 linux 程序包。针对 Debian 9 stretch，这些问题已在 4.9.272-2 版本中修复。
另见
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990072
https://security-tracker.debian.org/tracker/source-package/linux
https://www.debian.org/lts/security/2021/dla-2713
https://security-tracker.debian.org/tracker/CVE-2021-21781
https://security-tracker.debian.org/tracker/CVE-2021-33909
https://security-tracker.debian.org/tracker/CVE-2021-34693
插件详情
严重性: High
ID: 151891
文件名: debian_DLA-2713.nasl
版本: 1.4
类型: local
代理: unix
发布时间: 2021/7/21
最近更新时间: 2022/1/20
支持的传感器: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus
风险信息
VPR
风险因素: Critical
分数: 9.5
CVSS v2
风险因素: High
基本分数: 7.2
时间分数: 6.3
矢量: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS 分数来源: CVE-2021-33909
CVSS v3
风险因素: High
基本分数: 7.8
时间分数: 7.5
矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
时间矢量: CVSS:3.0/E:H/RL:O/RC:C
漏洞信息
CPE: p-cpe:/a:debian:debian_linux:hyperv-daemons, p-cpe:/a:debian:debian_linux:libcpupower-dev, p-cpe:/a:debian:debian_linux:libcpupower1, p-cpe:/a:debian:debian_linux:libusbip-dev, p-cpe:/a:debian:debian_linux:linux-compiler-gcc-6-arm, p-cpe:/a:debian:debian_linux:linux-compiler-gcc-6-x86, p-cpe:/a:debian:debian_linux:linux-cpupower, p-cpe:/a:debian:debian_linux:linux-doc-4.9, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-686, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-686-pae, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-all, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-all-amd64, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-all-arm64, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-all-armel, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-all-armhf, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-all-i386, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-amd64, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-arm64, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-armmp, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-armmp-lpae, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-common, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-common-rt, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-marvell, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-rt-686-pae, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-14-rt-amd64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-686, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-686-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-686-pae, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-686-pae-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-amd64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-arm64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-arm64-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-armmp, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-armmp-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-armmp-lpae, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-armmp-lpae-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-marvell, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-marvell-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-rt-686-pae, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-rt-686-pae-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-rt-amd64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-14-rt-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-kbuild-4.9, p-cpe:/a:debian:debian_linux:linux-libc-dev, p-cpe:/a:debian:debian_linux:linux-manual-4.9, p-cpe:/a:debian:debian_linux:linux-perf-4.9, p-cpe:/a:debian:debian_linux:linux-source-4.9, p-cpe:/a:debian:debian_linux:linux-support-4.9.0-14, p-cpe:/a:debian:debian_linux:usbip, cpe:/o:debian:debian_linux:9.0
必需的 KB 项: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
可利用: true
易利用性: Exploits are available
补丁发布日期: 2021/7/20
漏洞发布日期: 2021/6/14
参考资料信息
CVE: CVE-2021-21781, CVE-2021-33909, CVE-2021-34693, CVE-2021-3609
IAVA: 2021-A-0350