Buffer overflow in gtk-vnc - CVE-2017-5884

Vulnerability identifier: #VU32989

CSH Severity: High

CVSSv4.0: 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/E:U/U:Amber

CVE-ID: CVE-2017-5884

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
gtk-vnc

Software vendor:
Gnome Development Team

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted (1) rre, (2) hextile, or (3) copyrect tile.

Install updates from vendor's website.

• http://www.openwall.com/lists/oss-security/2017/02/03/5
• http://www.openwall.com/lists/oss-security/2017/02/05/5
• http://www.securityfocus.com/bid/96016
• https://access.redhat.com/errata/RHSA-2017:2258
• https://bugzilla.gnome.org/show_bug.cgi?id=778048
• https://git.gnome.org/browse/gtk-vnc/commit/?id=ea0386933214c9178aaea9f2f85049ea3fa3e14a
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LGPQ5MQR6SN4DYTEFACHP2PP5RR26KYK/