Double Free in FreeRDP - CVE-2020-11044

Vulnerability identifier: #VU27970

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-11044

CWE-ID: CWE-415

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in "update_read_cache_bitmap_v3_order". A remote attacker can pass specially crafted data to the application, trigger double free error and cause a denal of service condition on the target system.

Note: This vulnerability affects versions greater than 1.2

FreeRDP
freerdp (Red Hat package)
vinagre (Red Hat package)
freerdp
freerdp-debugsource
libwinpr
freerdp-help
freerdp-debuginfo
libwinpr-devel
freerdp-devel
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for ARM 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 x86_64
openEuler

Install updates from vendor's website.

FreeRDP - update to 2.0.0
freerdp (Red Hat package) - addressed in versions 2.1.1-1.el8, 2.1.1-2.el7
vinagre (Red Hat package) - update to 3.22.0-23.el8
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/commit/67c2aa52b2ae0341d469071d1bc8aab91f8d2ed8
• https://github.com/FreeRDP/FreeRDP/issues/6013
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cgqh-p732-6x2w

• Multiple vulnerabilities in FreeRDP
• Red Hat Enterprise Linux 7 update for freerdp
• Red Hat Enterprise Linux 8 update for freerdp and vinagre
• openEuler update for freerdp