安全公告/【CVE-2021-3782】

基本信息

漏洞描述

An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.

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

参考

https://access.redhat.com/security/cve/CVE-2021-3782
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3782
https://nvd.nist.gov/vuln/detail/CVE-2021-3782