Use-after-free in LibVNCServer - CVE-2018-15126
Published: January 14, 2019 / Updated: January 22, 2019
Vulnerability identifier: #VU16962
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-2018-15126
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a heap use-after-free error in server code of file transfer extension. A remote attacker can trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Affected software
LibVNCServer
libvncserver (Debian package)
Opensuse
libvncserver (Debian package)
Opensuse
How to mitigate CVE-2018-15126
Update to version 0.9.12.
LibVNCServer - update to 0.9.12
libvncserver (Debian package) - addressed in versions 0.9.9+dfsg2-6.1+deb8u5, 0.9.11+dfsg-1.3~deb9u1
libvncserver (Debian package) - addressed in versions 0.9.9+dfsg2-6.1+deb8u5, 0.9.11+dfsg-1.3~deb9u1