CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
85.5%
Severity: Critical
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.
The problems have been fixed upstream in version 0.9.11.
None.
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.
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.
https://bugs.archlinux.org/task/52481
https://github.com/LibVNC/libvncserver/pull/137
https://security.archlinux.org/CVE-2016-9941
https://security.archlinux.org/CVE-2016-9942
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ArchLinux | any | any | libvncserver | < 0.9.11-1 | UNKNOWN |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
85.5%