What’s Vulnerable › Vulnerabilities

CVE-2022-3437

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-12 · updated 2026-06-17
• Weakness: CWE-122

Description

A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.

Affected products

• Fedoraproject Fedora: 36, 37
• Samba: from 4.0.0 before 4.15.11; from 4.16.0 before 4.16.6; from 4.17.0 before 4.17.2 — fixed in 4.15.11, 4.16.6, 4.17.2

How to fix

Upgrade to a fixed version: Samba 4.15.11, 4.16.6, 4.17.2. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2023/02/08/1
• https://access.redhat.com/security/cve/CVE-2022-3437
• https://bugzilla.redhat.com/show_bug.cgi?id=2137774
• https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
• https://security.gentoo.org/glsa/202309-06
• https://security.gentoo.org/glsa/202310-06
• https://security.netapp.com/advisory/ntap-20230216-0008/
• https://www.samba.org/samba/security/CVE-2022-3437.html
• http://www.openwall.com/lists/oss-security/2023/02/08/1
• https://access.redhat.com/security/cve/CVE-2022-3437
• https://bugzilla.redhat.com/show_bug.cgi?id=2137774
• https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html

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