What’s Vulnerable › Vulnerabilities

CVE-2020-13396

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-22 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in FreeRDP before 2.1.1. An out-of-bounds (OOB) read vulnerability has been detected in ntlm_read_ChallengeMessage in winpr/libwinpr/sspi/NTLM/ntlm_message.c.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.10, 20.04
• Debian Linux: 9.0, 10.0
• FreeRDP: before 2.1.1 — fixed in 2.1.1
• openSUSE Leap: 15.1

How to fix

Upgrade to a fixed version: FreeRDP 2.1.1. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html
• https://github.com/FreeRDP/FreeRDP/commit/48361c411e50826cb602c7aab773a8a20e1da6bc
• https://github.com/FreeRDP/FreeRDP/commit/8fb6336a4072abcee8ce5bd6ae91104628c7bb69
• https://github.com/FreeRDP/FreeRDP/compare/2.1.0...2.1.1
• https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html
• https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
• https://usn.ubuntu.com/4379-1/
• https://usn.ubuntu.com/4382-1/
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html
• https://github.com/FreeRDP/FreeRDP/commit/48361c411e50826cb602c7aab773a8a20e1da6bc
• https://github.com/FreeRDP/FreeRDP/commit/8fb6336a4072abcee8ce5bd6ae91104628c7bb69
• https://github.com/FreeRDP/FreeRDP/compare/2.1.0...2.1.1

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