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云安全日报210422:Ubuntu Linux内核发现执行任意代码漏洞,需要尽快升级
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简介...
Ubuntu是一个以桌面应用为主的Linux操作系统。它是一个开放源代码的自由软件,提供了一个健壮、功能丰富的计算环境,既适合家庭使用又适用于商业环境。Ubuntu为全球数百个公司提供商业支持。
4月22日,Ubuntu发布了安全更新,修复了Linux内核发现的执行任意代码漏洞。以下是漏洞详情:
漏洞详情
来源:https://ubuntu.com/security/notices/U云安SN-4916-2
1.CVE-2021-29154 严重程度:高
在某些情况下,Linux内核中用于x86的BPF JIT编译器无法正确验证分支位移的计算。本地攻击者可能会使用它来导致拒绝
服务(系统崩溃)或可能执行任意代码。
2.CVE-2021-3493 严重程度:高
Linux内核中overlayfs文件系统中的Ubuntu特定问题,在该问题中,它未正确验证关于用户名称空间的文件系统功能的全日应用程序。由于Ubuntu附带了一个允许非特权的overlayfs挂载的补丁,因此本地攻击者可以使用它来获得更高的特权。
受影响产品和版本
上述漏洞影响Ubuntu 20.04 LTS, Ubuntu 18.04 LTS, Ubuntu 16.04 LTS, Ubuntu 14.04 ESM
解决方案
可以通过将系统更新为以下软件包版本来解决此问题:
Ubuntu 20.04:
linux-image-5.6.0-1报2055-oem - 5.6.0-1055.59
linux-image-oem-20.04 - 5.6.0.1055.51
Ubuntu 18.04:
linux-image-gkeop-5.3 - 5.3.0.74.131
linux-image-gke-5.3 - 5.3.0.1043.26
linux-image-5.3.0-74-lowlatency - 5.3.0-74.70
linux-image-5.3.010-1040-raspi2 - 5.3.0-1040.42
linux-image-5.3.0-74-generic - 5.3.0-74.70
linux-image-5.3.0-1043-gke - 5.3.0-1043.46
linux-image-raspi2-hwe-18.04 - 5.3.0.1040.29
Ubuntu 16.04:
linux-image-4.4.0-1152-raspi2 - 4.424.0-1152.163
linux-image-powerpc-e500mc - 4.4.0.210.216
linux-image-4.4.0-210-generic-lpae - 4.4.0-210.242
linux-image-4.4.0-210-powerpc-smp - 4.4.0-210.242
linux-image-4.4.0-210-lowlatency - 4.4.0-210.242:2
linux-image-4.4.0-210-powerpc64-emb - 4.4.0-210.242
linux-image-virtual - 4.4.0.210.216
linux-image-snapdragon - 4.4.0.1156.148
linux-image-powerpc64-emb - 4.4.0.210.216
linux-image-4.4.0-1156-snapdragon -Ub 4.4.0-1156.166
linux-image-4.4.0-210-powerpc-e500mc - 4.4.0-210.242
linux-image-4.4.0-1128-aws - 4.4.0-1128.142
linux-image-generic - 4.4.0.210.216
linux-image-4.4.0-210-powerpc64-smp - 4.4.0-210.242
linuxun-image-aws - 4.4.0.1128.133
linux-image-kvm - 4.4.0.1093.91
linux-image-4.4.0-1093-kvm - 4.4.0-1093.102
linux-image-raspi2 - 4.4.0.1152.152
linux-image-powerpc-smp - 4.4.0.210.216
linux-image-generic-lpae - 4.tu4.0.210.216
linux-image-4.4.0-210-generic - 4.4.0-210.242
linux-image-powerpc64-smp - 4.4.0.210.216
linux-image-lowlatency - 4.4.0.210.216
Ubuntu 14.04:
linux-image-powerpc-smp-lts-xenial - 4.4.0.210.183
lin Lux-image-lowlatency-lts-xenial - 4.4.0.210.183
linux-image-4.4.0-210-lowlatency - 4.4.0-210.242~14.04.1
linux-image-4.4.0-210-powerpc-e500mc - 4.4.0-210.242~14.04.1
linux-image-4.4.0-210-powerpc64-embin - 4.4.0-210.242~14.04.1
linux-image-4.4.0-210-generic - 4.4.0-210.242~14.04.1
linux-image-powerpc-e500mc-lts-xenial - 4.4.0.210.183
linux-image-generic-lpae-lts-xenial - 4.4.0.210.183
linux-image-powerpc64-suxmp-lts-xenial - 4.4.0.210.183
linux-image-4.4.0-1092-aws - 4.4.0-1092.96
linux-image-powerpc64-emb-lts-xenial - 4.4.0.210.183
linux-image-4.4.0-210-powerpc-smp - 4.4.0-210.242~14.04.1
linux-image-aws - 4.4.0.1内核092.89
linux-image-generic-lts-xenial - 4.4.0.210.183
linux-image-4.4.0-210-generic-lpae - 4.4.0-210.242~14.04.1
linux-image-4.4.0-210-powerpc64-smp - 4.4.0-210.242~14.04.1
linux-image-virtual-lts-xenial发现 - 4.4.0.210.183
查看更多漏洞信息 以及升级请访问官网:
https://ubuntu.com/security/cve
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