CVE-2014-6051

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-09-30 · updated 2026-06-17
Weakness: CWE-189

Description

Integer overflow in the MallocFrameBuffer function in vncviewer.c in LibVNCServer 0.9.9 and earlier allows remote VNC servers to cause a denial of service (crash) and possibly execute arbitrary code via an advertisement for a large screen size, which triggers a heap-based buffer overflow.

Affected products

Debian Linux: 7.0
Fedoraproject Fedora: 20, 21
Libvncserver: through 0.9.9
Oracle Corporation Solaris Operating System: 11.3
RedHat Enterprise Linux Server Aus: 6.5
RedHat Enterprise Linux Server Eus: 6.5.z

References

http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
http://rhn.redhat.com/errata/RHSA-2015-0113.html
http://seclists.org/oss-sec/2014/q3/639
http://secunia.com/advisories/61506
http://www.debian.org/security/2014/dsa-3081
http://www.ocert.org/advisories/ocert-2014-007.html
http://www.openwall.com/lists/oss-security/2014/09/25/11
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.securityfocus.com/bid/70093
https://github.com/newsoft/libvncserver/commit/045a044e8ae79db9244593fbce154cdf6e843273

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