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CVE-2021-3472

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Date: April 26, 2021

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.

Language: C

Severity Score

Related Resources (20)

https://nvd.nist.gov/vuln/detail/CVE-2021-3472
https://www.tenable.com/plugins/nessus/148701
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
https://www.debian.org/security/2021/dsa-4893
https://security.gentoo.org/glsa/202104-02
https://seclists.org/oss-sec/2021/q2/20
https://security-tracker.debian.org/tracker/CVE-2021-3472
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://access.redhat.com/security/cve/CVE-2021-3472
https://security.alpinelinux.org/vuln/CVE-2021-3472
http://www.openwall.com/lists/oss-security/2021/04/13/1
https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cd
https://lists.x.org/archives/xorg-announce/2021-April/003080.html
https://lists.debian.org/debian-lts-announce/2021/04/msg00013.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3472
https://bugzilla.redhat.com/show_bug.cgi?id=1944167
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
https://www.zerodayinitiative.com/advisories/ZDI-21-463/
https://www.mend.io/vulnerability-database/CVE-2021-3472

Severity Score

Weakness Type (CWE)

Integer Underflow (Wrap or Wraparound)

CWE-191

Top Fix

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Upgrade Version

Upgrade to version xorg-server-1.20.11, xwayland-21.1.1

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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