David King vino up to 2.31.91 vino-server.c vino_server_client_data_pending input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in David King vino up to 2.31.91 and classified as critical. This issue affects the function vino_server_client_data_pending of the file vino-server.c. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The vino_server_client_data_pending function in vino-server.c in GNOME Vino 2.26.1, 2.32.1, 3.7.3, and earlier, and 3.8 when encryption is disabled, does not properly clear client data when an error causes the connection to close during authentication, which allows remote attackers to cause a denial of service (infinite loop, CPU and disk consumption) via multiple crafted requests during authentication.

The weakness was disclosed 10/01/2013 (Website). It is possible to read the advisory at trustwave.com. The identification of this vulnerability is CVE-2013-5745 since 09/16/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed by Trustwave's SpiderLabs and been published before and not just after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 70593 (Fedora 19 : vino-3.8.1-3.fc19 (2013-17121)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 121836 (Solaris 11.1 Support Repository Update (SRU) 16.5.0 Missing).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13405.

The vulnerability is also documented in the databases at Tenable (70593) and Exploit-DB (28338).





CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.5
VulDB Temp Score: 7.1
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Class: Input validation

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Trustwave's SpiderLabs
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Nessus ID: 70593
Nessus Name: Fedora 19 : vino-3.8.1-3.fc19 (2013-17121)
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OpenVAS ID: 881807
OpenVAS Name: CentOS Update for vino CESA-2013:1452 centos5
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Recommended: no mitigation known
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09/16/2013 🔍
09/17/2013 +1 days 🔍
09/17/2013 +0 days 🔍
09/17/2013 +0 days 🔍
10/01/2013 +14 days 🔍
10/01/2013 +0 days 🔍
10/01/2013 +0 days 🔍
10/07/2013 +6 days 🔍
10/25/2013 +18 days 🔍
03/24/2015 +515 days 🔍
01/08/2022 +2482 days 🔍


Advisory: USN-1980-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-5745 (🔍)

Vulnerability Center: 41783 - Vino VNC Server Remote DOS Vulnerability Due to Improper Data Clearance While Closing A Connection, Medium
SecurityFocus: 58795
Secunia: 55090 - Ubuntu update for vino, Less Critical

scip Labs: https://www.scip.ch/en/?labs.20161013


Created: 03/24/2015 03:54 PM
Updated: 01/08/2022 08:39 AM
Changes: 03/24/2015 03:54 PM (71), 05/12/2017 08:55 PM (12), 01/08/2022 08:32 AM (3), 01/08/2022 08:36 AM (1), 01/08/2022 08:39 AM (1)
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Cache ID: 100:2B9:40


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