critical
9.1
CWE
125 191
Advisory Published
CVE Published
Updated

CVE-2023-40181: Integer-Underflow leading to Out-Of-Bound Read in FreeRDP

First published: Thu Aug 31 2023(Updated: )

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.

Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
FreeRDP FreeRDP<2.11.0
FreeRDP FreeRDP=3.0.0-beta1
FreeRDP FreeRDP=3.0.0-beta2
Debian Debian Linux=10.0
Fedoraproject Fedora=37
Fedoraproject Fedora=38
Fedoraproject Fedora=39
debian/freerdp2<=2.0.0~git20190204.1.2693389a+dfsg1-1+deb10u2<=2.3.0+dfsg1-2+deb11u1<=2.10.0+dfsg1-1
2.3.0+dfsg1-2+deb10u4
2.11.2+dfsg1-1
2.11.5+dfsg1-1
ubuntu/freerdp2<2.2.0+dfsg1-0ubuntu0.18.04.4+
2.2.0+dfsg1-0ubuntu0.18.04.4+
ubuntu/freerdp2<2.2.0+dfsg1-0ubuntu0.20.04.5
2.2.0+dfsg1-0ubuntu0.20.04.5
ubuntu/freerdp2<2.6.1+dfsg1-3ubuntu2.4
2.6.1+dfsg1-3ubuntu2.4
ubuntu/freerdp2<2.10.0+dfsg1-1ubuntu0.2
2.10.0+dfsg1-1ubuntu0.2
ubuntu/freerdp2<2.10.0+dfsg1-1.1ubuntu1
2.10.0+dfsg1-1.1ubuntu1
ubuntu/freerdp2<2.11.0
2.11.0
redhat/freerdp<2.11.0
2.11.0
redhat/freerdp<3.0.0
3.0.0

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-40181?

    CVE-2023-40181 is a vulnerability in FreeRDP, an open-source implementation of the Remote Desktop Protocol (RDP), that allows an integer underflow leading to an out-of-bound read in the `zgfx_decompress_segment` function.

  • What is the severity of CVE-2023-40181?

    The severity of CVE-2023-40181 is critical with a CVSS score of 9.1.

  • How does CVE-2023-40181 affect FreeRDP?

    CVE-2023-40181 affects FreeRDP versions up to and including 2.11.0, 3.0.0-beta1, and 3.0.0-beta2.

  • How can I fix CVE-2023-40181 in FreeRDP?

    To fix CVE-2023-40181 in FreeRDP, you should update to version 2.11.2 or later.

  • Where can I find more information about CVE-2023-40181?

    You can find more information about CVE-2023-40181 on the FreeRDP GitHub repository and the FreeRDP security advisories page.

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