Buffer overflow in Samba
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.037 (89.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000
Affected products
- Samba
- Fedoraproject Fedora — versions 36, 37
- Samba — versions Fixed in samba 4.15.11, samba 4.16.6, samba 4.17.2.
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.samba.org/samba/security/CVE-2022-3437.html (Vendor Advisory)
- access.redhat.com/security/cve/CVE-2022-3437 (Third Party Advisory)
- www.openwall.com/lists/oss-security/2023/02/08/1 (mailing-list)
- security.netapp.com/advisory/ntap-20230216-0008/
- security.gentoo.org/glsa/202309-06 (vendor-advisory)
- security.gentoo.org/glsa/202310-06 (vendor-advisory)
- lists.debian.org/debian-lts-announce/2024/04/msg00015.html (mailing-list)
Frequently asked questions
- What is CVE-2022-3437?
- CVE-2022-3437 is a medium-severity vulnerability in Samba, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2023-01-12.
- How severe is CVE-2022-3437?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2022-3437 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.