[manjaro-security] [arch-security] [ASA-201701-20] libvncserver: arbitrary code execution
anthraxx at archlinux.org
Fri Jan 13 13:57:52 CET 2017
Arch Linux Security Advisory ASA-201701-20
Date : 2017-01-13
CVE-ID : CVE-2016-9941 CVE-2016-9942
Package : libvncserver
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-124
The package libvncserver before version 0.9.11-1 is vulnerable to
arbitrary code execution.
Upgrade to 0.9.11-1.
# pacman -Syu "libvncserver>=0.9.11-1"
The problems have been fixed upstream in version 0.9.11.
- CVE-2016-9941 (arbitrary code execution)
A heap-based buffer overflow has been discovered in rfbproto.c in the
LibVNCClient part of 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 containing a
subrectangle outside of the client drawing area.
- CVE-2016-9942 (arbitrary code execution)
A heap-based buffer overflow has been discovered 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.
A remote attacker is able to use specially crafted messages to execute
arbitrary code on the affected host.
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