CVE-2021-3472: X.Org Server XChangeFeedbackControl Integer Underflow Privilege Escalation Vulnerability
First published: Mon Mar 29 2021(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xorg-server | 2:1.20.4-1+deb10u4 2:1.20.4-1+deb10u9 2:1.20.11-1+deb11u6 2:21.1.7-3 2:21.1.8-1 | |
| redhat/xorg-x11-server | <1.20.11 | 1.20.11 |
| X.Org Xserver | ||
| X.org X.org | <1.20.11 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 |
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Reference Links
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cd
- https://lists.x.org/archives/xorg-announce/2021-April/003080.html
- https://security-tracker.debian.org/tracker/CVE-2021-3472
- http://www.openwall.com/lists/oss-security/2021/04/13/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1944167
- 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/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
- https://seclists.org/oss-sec/2021/q2/20
- https://security.gentoo.org/glsa/202104-02
- https://www.debian.org/security/2021/dsa-4893
- https://www.tenable.com/plugins/nessus/148701
- https://www.zerodayinitiative.com/advisories/ZDI-21-463/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1949217
- https://access.redhat.com/errata/RHSA-2021:2033
- https://access.redhat.com/security/cve/cve-2021-3472
Frequently Asked Questions
What is CVE-2021-3472?
CVE-2021-3472 is a vulnerability in X.Org Server that allows local attackers to escalate privileges on affected installations.
How does CVE-2021-3472 impact X.Org Server?
CVE-2021-3472 allows local attackers to escalate privileges on affected installations of X.Org Server.
What is the severity of CVE-2021-3472?
CVE-2021-3472 has a severity rating of high.
How can CVE-2021-3472 be exploited?
To exploit CVE-2021-3472, an attacker must first obtain the ability to execute low-privileged code on the target system.
What is the remedy for CVE-2021-3472?
The remedy for CVE-2021-3472 is to update X.Org Server to versions 2:1.20.4-1+deb10u4, 2:1.20.4-1+deb10u9, 2:1.20.11-1+deb11u6, 2:21.1.7-3, or 2:21.1.8-1.
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