Vulnerability Details : CVE-2021-3472
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.
Vulnerability category: Gain privilege
Exploit prediction scoring system (EPSS) score for CVE-2021-3472
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 8 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-3472
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-3472
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The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.Assigned by: secalert@redhat.com (Primary)
References for CVE-2021-3472
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https://lists.debian.org/debian-lts-announce/2021/04/msg00013.html
[SECURITY] [DLA 2627-1] xorg-server security updateMailing List;Third Party Advisory
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https://lists.x.org/archives/xorg-announce/2021-April/003080.html
X.Org server security advisory: April 13, 2021Mailing List;Patch;Vendor Advisory
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https://www.zerodayinitiative.com/advisories/ZDI-21-463/
ZDI-21-463 | Zero Day InitiativeThird Party Advisory;VDB Entry
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
[SECURITY] Fedora 33 Update: xorg-x11-server-1.20.11-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://www.tenable.com/plugins/nessus/148701
Debian DLA-2627-1 : xorg-server security update | Tenable®Third Party Advisory
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https://security.gentoo.org/glsa/202104-02
X.Org X Server: Privilege escalation (GLSA 202104-02) — Gentoo securityThird Party Advisory
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https://www.debian.org/security/2021/dsa-4893
Debian -- Security Information -- DSA-4893-1 xorg-serverThird Party Advisory
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https://seclists.org/oss-sec/2021/q2/20
oss-sec: X.Org server security advisory: April 13, 2021Mailing List;Patch;Third Party Advisory
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http://www.openwall.com/lists/oss-security/2021/04/13/1
oss-security - X.Org server security advisory: April 13, 2021Mailing List;Patch;Third Party Advisory
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https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cd
Fix XChangeFeedbackControl() request underflow (7aaf54a1) · Commits · xorg / xserver · GitLabPatch;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
[SECURITY] Fedora 32 Update: xorg-x11-server-1.20.11-1.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
[SECURITY] Fedora 34 Update: xorg-x11-server-Xwayland-21.1.1-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
[SECURITY] Fedora 34 Update: xorg-x11-server-1.20.11-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1944167
1944167 – (CVE-2021-3472) CVE-2021-3472 xorg-x11-server: XChangeFeedbackControl integer underflow leads to privilege escalationIssue Tracking;Patch;Third Party Advisory
Products affected by CVE-2021-3472
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*