Out-of-bounds write in FreeRDP - CVE-2020-11521

Vulnerability identifier: #VU27988

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-11521

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in "libfreerdp/codec/planar.c". A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

Note: This vulnerability affects versions greater than 1.0

FreeRDP
Gentoo Linux
CentOS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Opensuse
Ubuntu
openEuler
freerdp (Alpine package)
freerdp (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
libfreerdp-client1.1 (Ubuntu package)
libfreerdp-common1.1.0 (Ubuntu package)
libfreerdp-core1.1 (Ubuntu package)
freerdp
freerdp-debugsource
libwinpr
freerdp-help
freerdp-debuginfo
libwinpr-devel
freerdp-devel

Install updates from vendor's website.

FreeRDP - update to 2.0.0
freerdp (Alpine package) - update to 2.0.0-r1
freerdp (Red Hat package) - addressed in versions 2.0.0-4.rc4.el7_8, 2.0.0-46.rc4.el8_1.1, 2.0.0-46.rc4.el8_2.1
libfreerdp-client1.1 (Ubuntu package) - update to 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2
libfreerdp-common1.1.0 (Ubuntu package) - update to 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2
libfreerdp-core1.1 (Ubuntu package) - update to 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2
freerdp - update to 2.2.0-2
freerdp-debugsource - update to 2.2.0-2
libwinpr - update to 2.2.0-2
freerdp-help - update to 2.2.0-2
freerdp-debuginfo - update to 2.2.0-2
libwinpr-devel - update to 2.2.0-2
freerdp-devel - update to 2.2.0-2

• https://github.com/FreeRDP/FreeRDP/commits/master
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5cwc-6wc9-255w
• https://pub.freerdp.com/cve/CVE-2020-11521/pocAnalysis_6.pdf

• Multiple vulnerabilities in FreeRDP
• Gentoo update for FreeRDP
• Red Hat Enterprise Linux 8 update for freerdp
• Red Hat Enterprise Linux 8 update for freerdp
• Red Hat Enterprise Linux 7 update for freerdp
• CentOS 7 update for freerdp
• OpenSUSE Linux update for freerdp
• Out-of-bounds write in freerdp (Alpine package)
• Red Hat Enterprise Linux 8.1 Extended Update Support update for freerdp
• openEuler update for freerdp
• Ubuntu update for freerdp