Incorrect Conversion between Numeric Types in FreeRDP - CVE-2020-4032

Vulnerability identifier: #VU29361

CSH Severity: Medium

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

CVE-ID: CVE-2020-4032

CWE-ID: CWE-681

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to an integer casting issue in "update_recv_secondary_order". A remote attacker can gain access to sensitive information on the target system.

FreeRDP
Arch Linux
Opensuse
Ubuntu
Fedora
freerdp (Alpine package)
libfreerdp-client2-2 (Ubuntu package)
libfreerdp-server2-2 (Ubuntu package)
libfreerdp2-2 (Ubuntu package)
freerdp

Install updates from vendor's website.

FreeRDP - update to 2.1.2
freerdp (Alpine package) - update to 2.1.2-r0
libfreerdp-client2-2 (Ubuntu package) - addressed in versions 2.2.0+dfsg1-0ubuntu0.18.04.1, 2.2.0+dfsg1-0ubuntu0.20.04.1
libfreerdp-server2-2 (Ubuntu package) - addressed in versions 2.2.0+dfsg1-0ubuntu0.18.04.1, 2.2.0+dfsg1-0ubuntu0.20.04.1
libfreerdp2-2 (Ubuntu package) - addressed in versions 2.2.0+dfsg1-0ubuntu0.18.04.1, 2.2.0+dfsg1-0ubuntu0.20.04.1
freerdp - addressed in versions 2.2.0-1.fc31, 2.2.0-1.fc32, 2.2.0-4.fc33

• http://www.freerdp.com/2020/06/22/2_1_2-released
• https://github.com/FreeRDP/FreeRDP/commit/e7bffa64ef5ed70bac94f823e2b95262642f5296
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3898-mc89-x2vc

• Multiple vulnerabilities in FreeRDP
• Arch Linux update for freerdp
• OpenSUSE Linux update for freerdp
• Incorrect Conversion between Numeric Types in freerdp (Alpine package)
• Ubuntu update for freerdp2
• Fedora 31 update for freerdp
• Fedora 32 update for freerdp
• Fedora 33 update for freerdp