CVE-2020-11521: Integer Overflow
Last updated 25 August 2025
Other sources
libfreerdp/codec/planar.c in FreeRDP version > 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/freerdp2to a version that resolves this vulnerability.Fixed in 2.3.0+dfsg1-2+deb11u1Fixed in 2.3.0+dfsg1-2+deb11u3Fixed in 2.11.7+dfsg1-6~deb12u1 - Upgrade
Upgrade
alpine/freerdpto a version that resolves this vulnerability.Fixed in 2.0.0-r0 - Upgrade
Upgrade
alpine/freerdp2to a version that resolves this vulnerability.Fixed in 2.0.0-r0
Event History
Frequently Asked Questions
What is the severity of CVE-2020-11521?
CVE-2020-11521 is classified as a high-severity vulnerability due to its potential for out-of-bounds writes which could lead to arbitrary code execution.
How do I fix CVE-2020-11521?
To fix CVE-2020-11521, you should upgrade FreeRDP to version 2.3.0+dfsg1-2+deb11u1 or later.
Which versions of FreeRDP are affected by CVE-2020-11521?
FreeRDP versions greater than 1.0 and up to 2.0.0-rc4 are affected by CVE-2020-11521.
What type of vulnerability is CVE-2020-11521?
CVE-2020-11521 is an out-of-bounds write vulnerability that may allow attackers to execute arbitrary code.
Is CVE-2020-11521 present in Debian systems?
Yes, CVE-2020-11521 can be present in Debian systems running vulnerable versions of FreeRDP.