Out-of-bounds read in rdesktop - CVE-2018-8799
Published: February 14, 2019 / Updated: May 18, 2020
Vulnerability identifier: #VU17677
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-8799
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to an out-of-bounds read condition in the process_secondary_order() 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 segmentation fault (segfault) and cause the service to crash.
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-2018-8799
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