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CVE-2023-40181

CRITICALCVSS 9.1/10EPSS 1.43%

Last modified

CVE-2023-40181 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions are subject to an Integer-Underflow leading to Out-Of-Bound Read in the `zgfx_decompress_segment` function. EPSS estimates a 1.43% chance of exploitation in the next 30 days.

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions are subject to an Integer-Underflow leading to Out-Of-Bound Read in the `zgfx_decompress_segment` function. In the context of `CopyMemory`, it's possible to read data beyond the transmitted packet range and likely cause a crash. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this issue.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
1.43%

69.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
FreerdpFreerdp< 2.11.0—
FreerdpFreerdp3.0.0Beta1
DebianDebian Linux10.0—
FedoraprojectFedora37—
FedoraprojectFedora38—
FedoraprojectFedora39—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-40181?
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions are subject to an Integer-Underflow leading to Out-Of-Bound Read in the `zgfx_decompress_segment` function. In the context of `CopyMemory`, it's possible to read data beyond the transmitted packet range and likely cause a crash. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this issue.
How severe is CVE-2023-40181?
CVE-2023-40181 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.
How do I fix CVE-2023-40181?
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.

Are you affected by CVE-2023-40181?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST