CVE-2016-9942 Information

Description

Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.debian.org/security/2017/dsa-3753 http://www.securityfocus.com/bid/95170 https://github.com/LibVNC/libvncserver/pull/137 https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.11 https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html https://security.gentoo.org/glsa/201702-24 https://usn.ubuntu.com/4587-1/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8