Vulnerabilities > CVE-2020-27674 - Out-of-bounds Write vulnerability in multiple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
LOW Integrity impact
LOW Availability impact
LOW Summary
An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://xenbits.xen.org/xsa/advisory-286.html
- https://security.gentoo.org/glsa/202011-06
- https://www.debian.org/security/2020/dsa-4804
- http://www.openwall.com/lists/oss-security/2021/01/19/5
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3U4LNKKXU4UP4Z5XP6TMIWSML3QODPE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZAM3LYJ5TZLSSNL3KXFILM46QKVTOUA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/