安全公告/【CVE-2021-3696】

基本信息

漏洞描述

A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

修复方式

sudo apt update && sudo apt dist-upgrade

漏洞判定

执行命令apt policy PackageName获取软件包版本号，版本小于修复版本，则受此漏洞影响，版本大于等于修复版本，则此漏洞已修复

参考

https://security-tracker.debian.org/tracker/CVE-2021-3696
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3696
https://nvd.nist.gov/vuln/detail/CVE-2021-3696