CVE-2020-13396

Name: CVE-2020-13396
Creator: NVD / NIST
Published: 2020-05-22T18:15:11.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 2.40%

Last modified Jun 17, 2026

CVE-2020-13396 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.. EPSS estimates a 2.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

2.40%

81.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Freerdp	Freerdp	< 2.1.1
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Canonical	Ubuntu Linux	20.04
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.htmlThird Party Advisory
https://github.com/FreeRDP/FreeRDP/commit/48361c411e50826cb602c7aab773a8a20e1da6bcPatch, Third Party Advisory
https://github.com/FreeRDP/FreeRDP/commit/8fb6336a4072abcee8ce5bd6ae91104628c7bb69Third Party Advisory
https://github.com/FreeRDP/FreeRDP/compare/2.1.0...2.1.1Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00054.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/4379-1/Third Party Advisory
https://usn.ubuntu.com/4382-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.htmlThird Party Advisory
https://github.com/FreeRDP/FreeRDP/commit/48361c411e50826cb602c7aab773a8a20e1da6bcPatch, Third Party Advisory
https://github.com/FreeRDP/FreeRDP/commit/8fb6336a4072abcee8ce5bd6ae91104628c7bb69Third Party Advisory
https://github.com/FreeRDP/FreeRDP/compare/2.1.0...2.1.1Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00054.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/4379-1/Third Party Advisory
https://usn.ubuntu.com/4382-1/Third Party Advisory

Timeline

Published: May 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13396?

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.

How severe is CVE-2020-13396?

CVE-2020-13396 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 2.40% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13396?

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-2020-13396?

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

Scan your code now

Source: NVD / NIST