CVE-2022-43995

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-11-02 · updated 2026-06-17
Weakness: CWE-125

Description

Sudo 1.8.0 through 1.9.12, with the crypt() password backend, contains a plugins/sudoers/auth/passwd.c array-out-of-bounds error that can result in a heap-based buffer over-read. This can be triggered by arbitrary local users with access to Sudo by entering a password of seven characters or fewer. The impact could vary depending on the system libraries, compiler, and processor architecture.

Affected products

sudo: from 1.8.0 before 1.9.12; 1.9.12 — fixed in 1.9.12

How to fix

Upgrade to a fixed version: sudo 1.9.12. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2139911
https://github.com/sudo-project/sudo/commit/bd209b9f16fcd1270c13db27ae3329c677d48050
https://news.ycombinator.com/item?id=33465707
https://security.gentoo.org/glsa/202211-08
https://www.sudo.ws/security/advisories/
https://bugzilla.redhat.com/show_bug.cgi?id=2139911
https://github.com/sudo-project/sudo/commit/bd209b9f16fcd1270c13db27ae3329c677d48050
https://news.ycombinator.com/item?id=33465707
https://security.gentoo.org/glsa/202211-08
https://www.sudo.ws/security/advisories/

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