LibVNCServer 0.9.9 vncviewer.c MallocFrameBuffer numeric error

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

A vulnerability classified as critical was found in LibVNCServer 0.9.9. Affected by this vulnerability is the function MallocFrameBuffer of the file vncviewer.c. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 09/30/2014 by Nicolas Ruff as confirmed advisory (CERT.org). It is possible to read the advisory at ocert.org. This vulnerability is known as CVE-2014-6051 since 09/01/2014. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 82784 (Debian DLA-197-1 : libvncserver security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168339 (SUSE Enterprise Linux Security update for LibVNCServer (SUSE-SU-2015:2088-2)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (96188) and Tenable (82784). Similar entries are available at 71842, 71696, 73231 and 73230.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Numeric error
CWE: CWE-189
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 82784
Nessus Name: Debian DLA-197-1 : libvncserver security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703081
OpenVAS Name: Debian Security Advisory DSA 3081-1 (libvncserver - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

09/01/2014 🔍
09/23/2014 +22 days 🔍
09/23/2014 +0 days 🔍
09/30/2014 +7 days 🔍
09/30/2014 +0 days 🔍
10/01/2014 +1 days 🔍
11/18/2014 +48 days 🔍
03/26/2015 +128 days 🔍
04/15/2015 +20 days 🔍
03/29/2022 +2540 days 🔍

Sourcesinfo

Advisory: 045a044e8ae79db9244593fbce154cdf6e843273
Researcher: Nicolas Ruff
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-6051 (🔍)
OVAL: 🔍

X-Force: 96188
Vulnerability Center: 47121 - LibVNCServer 0.9.9 and Prior Code Execution and DoS Vulnerability via an Advertisement for a Large Screen Size, High
SecurityFocus: 70091 - LibVNCServer CVE-2014-6052 Denial of Service Vulnerability
Secunia: 61506 - LibVNCServer Multiple Vulnerabilities, Moderately Critical

See also: 🔍

Entryinfo

Created: 03/26/2015 16:14
Updated: 03/29/2022 14:47
Changes: 03/26/2015 16:14 (71), 06/12/2017 08:24 (7), 03/29/2022 14:42 (4), 03/29/2022 14:46 (1), 03/29/2022 14:47 (1)
Complete: 🔍

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