CVE-2021-3472 Information

Description

A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://lists.x.org/archives/xorg-announce/2021-April/003080.html https://seclists.org/oss-sec/2021/q2/20 https://www.zerodayinitiative.com/advisories/ZDI-21-463/ https://bugzilla.redhat.com/show_bug.cgi?id=1944167 https://www.debian.org/security/2021/dsa-4893 https://www.tenable.com/plugins/nessus/148701 http://www.openwall.com/lists/oss-security/2021/04/13/1 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/ https://lists.debian.org/debian-lts-announce/2021/04/msg00013.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/ https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cd https://security.gentoo.org/glsa/202104-02

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8