CVE-2022-39317 Out of bounds read in zgfx decoder in FreeRDP

What is CVE-2022-39317?

CVE-2022-39317 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 16 Nov 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing a range check for input offset index in ZGFX decoder. A malicious server can trick a FreeRDP based client to read out of bound data and try to decode it. This issue has been addressed in version 2.9.0. There are no known workarounds for this issue.

Weakness: CWE-125

Which versions are affected by CVE-2022-39317?

It affects 2 products.

Products include Fedoraproject Fedora, Freerdp Freerdp.

How do I fix CVE-2022-39317?

Upgrade to a fixed version.

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

Is CVE-2022-39317 being exploited?

There is no known exploitation of CVE-2022-39317 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as CLEANSTART-2024-KS70372, DEBIAN-CVE-2022-39317, GHSA-99cm-4gw7-c8jh, UBUNTU-CVE-2022-39317.