CVE-2022-3437: fedoraproject fedora Heap-based Buffer Overflow
Vulnerability summary
CVE-2022-3437 is a medium (CVSS 6.5) Heap-based Buffer Overflow vulnerability in fedoraproject fedora. EPSS estimates a 3.86% chance of exploitation in the next 30 days, higher than 90.1% of scored vulnerabilities.
Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 16 · Related 11Timeline
- 12-01-2023PublishedVulnerability first disclosed.
- 28-10-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 5 sources · 1 version- CVE.orgCNA4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.86%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
Increase +0.17 pp
From 3.69% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine2 products
- heimdal< 7.7.1-r0
- samba≥ 4.0.0, < 4.15.12-r0 | ≥ 4.0.0, < 4.16.6-r0
Debian2 products
- heimdal< 7.8.git20221115.a6cf945+dfsg-1
- samba< 2:4.16.6+dfsg-1
Ubuntu2 products
- heimdal< 1.6~git20131207+dfsg-1ubuntu1.2+esm3 | < 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3 | < 7.5.0+dfsg-1ubuntu0.3 | < 7.7.0+dfsg-1ubuntu1.3 | All versions (No fix recorded)
- samba< 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13 | < 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2 | < 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1 | < 2:4.15.13+dfsg-0ubuntu0.20.04.1 | < 2:4.15.13+dfsg-0ubuntu1
Fedoraproject1 product
- fedoraEOL36 | 37
Samba1 product
- samba≥ 4.0.0, < 4.15.11 | ≥ 4.16.0, < 4.16.6 | ≥ 4.17.0, < 4.17.2
5 vendors · 8 products
References
19 links- access.redhat.com/security/cve/CVE-2022-3437Third Party Advisory
- www.openwall.com/lists/oss-security/2023/02/08/1Mailing List
- security.gentoo.org/glsa/202309-06Vendor Advisory
- security.gentoo.org/glsa/202310-06Vendor Advisory
