安全公告/【CVE-2021-20257】

基本信息

漏洞名称:
受影响操作系统:Asianux
危险等级:中危
影响源码包:qemu
CVSS评分:6.5
发现日期:2022-07-20
修复版本:4.1.0-69

漏洞描述

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

修复方式

yum update PackageName

漏洞判定

执行命令yum info 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

补丁

参考

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20257
https://nvd.nist.gov/vuln/detail/CVE-2021-20257