安全公告/【CVE-2022-2928】

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:dhcp
CVSS评分:6.5
发现日期:2022-10-31
修复版本:dhcp-4.4.2-9

漏洞描述

In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.

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-2022-2928
https://nvd.nist.gov/vuln/detail/CVE-2022-2928