CVE-2021-3800

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-08-23 · updated 2026-06-17
Weakness: CWE-200

Description

A flaw was found in glib before version 2.63.6. Due to random charset alias, pkexec can leak content from files owned by privileged users to unprivileged ones under the right condition.

Affected products

Debian Linux: 10.0
GNOME GLib: before 2.62.5; from 2.63.0 before 2.63.6 — fixed in 2.62.5, 2.63.6
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions

How to fix

Upgrade to a fixed version: GNOME GLib 2.62.5, 2.63.6. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2021-3800
https://bugzilla.redhat.com/show_bug.cgi?id=1938284
https://gitlab.gnome.org/GNOME/glib/-/commit/3529bb4450a51995
https://lists.debian.org/debian-lts-announce/2022/09/msg00020.html
https://security.netapp.com/advisory/ntap-20221028-0004/
https://www.openwall.com/lists/oss-security/2017/06/23/8
https://access.redhat.com/security/cve/CVE-2021-3800
https://bugzilla.redhat.com/show_bug.cgi?id=1938284
https://gitlab.gnome.org/GNOME/glib/-/commit/3529bb4450a51995
https://lists.debian.org/debian-lts-announce/2022/09/msg00020.html
https://security.netapp.com/advisory/ntap-20221028-0004/
https://www.openwall.com/lists/oss-security/2017/06/23/8

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