CVE-2022-3437 Memory corruption in samba

What is CVE-2022-3437?

CVE-2022-3437 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 12 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-122

Which versions are affected by CVE-2022-3437?

It affects 2 products.

Products include Fedoraproject Fedora, Samba Samba.

How do I fix CVE-2022-3437?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2022-3437 being exploited?

There is no known exploitation of CVE-2022-3437 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• How this page is made

Also known as ALPINE-CVE-2022-3437, AZL-12995, AZL-37016, CLEANSTART-2024-BZ36226, CLSA-2023-1675372486, CLSA-2023-1703011710 and 4 more.