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CVE-2022-3437

MEDIUMCVSS 6.5/10EPSS 3.69%

Last modified

CVE-2022-3437 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 3.69% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
3.69%

88.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
SambaSamba>= 4.0.0, < 4.15.11
SambaSamba>= 4.16.0, < 4.16.6
SambaSamba>= 4.17.0, < 4.17.2
FedoraprojectFedora36
FedoraprojectFedora37

References

Timeline

Published
Last Modified
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.
How severe is CVE-2022-3437?
CVE-2022-3437 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.69% probability of exploitation in the next 30 days.
How do I fix CVE-2022-3437?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST