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No exploitation reportedFix available

CVE-2022-3437

No exploitation reported by the sources we read.

  • Published2023-01-12
  • Fixed in4.17.2 · 4.16.6 · 4.15.11
  • WeaknessCWE-122

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-01-1215:15CVE publishedNVD

Versions per branch

NVD
Samba
BranchAffectedFixed in
4.17≥ 4.17.0, < 4.17.24.17.2
4.16≥ 4.16.0, < 4.16.64.16.6
4.x≥ 4.0.0, < 4.15.114.15.11
Fedoraproject fedora
BranchAffectedFixed in
36.x= 36no fix published
37.x= 37no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • samba
    Affected
    • = Fixed in samba 4.15.11, samba 4.16.6, samba 4.17.2.no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2024-04-22

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • heimdalUbuntu:Pro:16.04:LTSall versions · fixed in 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3
  • heimdalUbuntu:Pro:14.04:LTSall versions · fixed in 1.6~git20131207+dfsg-1ubuntu1.2+esm3
  • heimdalUbuntu:22.04:LTSall versions · no fixed version listed
  • heimdalUbuntu:20.04:LTSall versions · fixed in 7.7.0+dfsg-1ubuntu1.3
  • heimdalUbuntu:18.04:LTSall versions · fixed in 7.5.0+dfsg-1ubuntu0.3
  • heimdalMageia:8all versions · fixed in 7.7.1-1.2.mga8
  • heimdalDebian:14all versions · fixed in 7.8.git20221115.a6cf945+dfsg-1
  • heimdalDebian:13all versions · fixed in 7.8.git20221115.a6cf945+dfsg-1

72 more package ranges on OSV.dev

Vendor advisories

  • CVE-2022-3437 Red Hat Product Security

    samba: heap buffer overflow in GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal

Full record on NVD

Fix

  1. Update Samba to 4.17.2 · 4.16.6 · 4.15.11

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2024-04-22
  • CISA-ADPCVSS 3.14.32024-04-22
  • NVDCVSS 3.16.5read 2026-10-23
  • CNAweakness (CWE)CWE-122known since 2026-10-23
  • FIRST EPSSEPSS score3.9 %2026-11-08
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
2023-01-12
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2022-3437?

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.

Is CVE-2022-3437 actively exploited?

Active exploitation of CVE-2022-3437 has not been confirmed. Its EPSS score was 3.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-3437?

CVE-2022-3437 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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