VDB-11661 · CVE-2013-6886 · Nessus 71884

RealVNC 5.0.6 on UNIX/Linux vncserver-x11 access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in RealVNC 5.0.6 on UNIX/Linux. Affected by this issue is some unknown functionality of the file vncserver-x11. Performing a manipulation results in access control. This vulnerability is identified as CVE-2013-6886. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in RealVNC 5.0.6 on UNIX/Linux. It has been classified as problematic. This affects some unknown processing of the file vncserver-x11. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

RealVNC VNC 5.0.6 on Mac OS X, Linux, and UNIX allows local users to gain privileges via a crafted argument to the (1) vncserver, (2) vncserver-x11, or (3) Xvnc helper.

The weakness was released 12/19/2013 as not defined release notes (Website). The advisory is shared at realvnc.com. This vulnerability is uniquely identified as CVE-2013-6886 since 11/28/2013. An attack has to be approached locally. Required for exploitation is a authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 71884 (RealVNC < 5.0.7 Multiple Local Privilege Escalations), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 121693 (RealVNC Multiple Privilege Escalation Vulnerabilities).

Upgrading to version 5.0.7 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (71884), SecurityFocus (BID 64560†) and OSVDB (101482†). Entries connected to this vulnerability are available at VDB-11660 and VDB-11662. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

RealVNC

Version

5.0.6

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 71884
Nessus Name: RealVNC < 5.0.7 Multiple Local Privilege Escalations
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: RealVNC 5.0.7

Timelineinfo

11/28/2013 🔍
12/19/2013 +21 days 🔍
12/19/2013 +0 days 🔍
12/27/2013 +8 days 🔍
12/30/2013 +3 days 🔍
01/09/2014 +10 days 🔍
12/23/2024 +4001 days 🔍

Sourcesinfo

Advisory: realvnc.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6886 (🔍)
GCVE (CVE): GCVE-0-2013-6886
GCVE (VulDB): GCVE-100-11661
SecurityFocus: 64560
OSVDB: 101482

See also: 🔍

Entryinfo

Created: 12/30/2013 11:20
Updated: 12/23/2024 03:39
Changes: 12/30/2013 11:20 (62), 04/29/2019 09:51 (1), 12/23/2024 03:39 (20)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.