Integer overflow in rdesktop - CVE-2018-8794
Published: February 14, 2019 / Updated: May 18, 2020
Vulnerability identifier: #VU17682
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-8794
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow condition in the process_bitmap_updates() function. A remote attacker can trick the victim who is using a Remote Desktop Protocol (RDP) client on a targeted system into connecting to an attacker-controlled RDP server, trigger out-of-bounds write and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
rdesktop
Arch Linux
Gentoo Linux
SUSE Linux
Opensuse
Fedora
rdesktop (Alpine package)
rdesktop
Arch Linux
Gentoo Linux
SUSE Linux
Opensuse
Fedora
rdesktop (Alpine package)
rdesktop
How to mitigate CVE-2018-8794
Update to version 1.8.4.
rdesktop - update to 1.8.4
rdesktop (Alpine package) - update to 1.8.6-r0
rdesktop - addressed in versions 1.8.4-2.fc28, 1.8.4-2.fc29
rdesktop (Alpine package) - update to 1.8.6-r0
rdesktop - addressed in versions 1.8.4-2.fc28, 1.8.4-2.fc29