Cisco AnyConnect Secure Mobility Client up to 2.2.135 ActiveX Control vpndownloader.exe input validation

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Cisco AnyConnect Secure Mobility Client up to 2.2.135. Affected by this issue is some unknown functionality of the file vpndownloader.exe of the component ActiveX Control. The manipulation results in input validation. This vulnerability is cataloged as CVE-2011-2039. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as very critical has been found in Cisco AnyConnect Secure Mobility Client up to 2.2.135 (Network Encryption Software). Affected is an unknown part of the file vpndownloader.exe of the component ActiveX Control. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The helper application in Cisco AnyConnect Secure Mobility Client (formerly AnyConnect VPN Client) before 2.3.185 on Windows, and on Windows Mobile, downloads a client executable file (vpndownloader.exe) without verifying its authenticity, which allows remote attackers to execute arbitrary code via the url property to a certain ActiveX control in vpnweb.ocx, aka Bug ID CSCsy00904.

The weakness was shared 06/02/2011 with Cisco as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability is traded as CVE-2011-2039 since 05/10/2011. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/02/2024).

The exploit is shared for download at packetstormsecurity.com. It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 54954 (Cisco AnyConnect Secure Mobility Client < 2.3.254 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and relying on port 445. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119357 (Cisco AnyConnect Secure Mobility Client Multiple Vulnerabilities).

Upgrading to version 2.2.136 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11424.

The vulnerability is also documented in the databases at X-Force (67739), Tenable (54954), SecurityFocus (BID 48077†), OSVDB (72714†) and SecurityTracker (ID 1025591†). The entries VDB-57575 and VDB-57565 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 54954
Nessus Name: Cisco AnyConnect Secure Mobility Client < 2.3.254 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Saint ID: exploit_info/cisco_anyconnect_vpnweb_url
Saint Name: Cisco AnyConnect Secure Mobility Client VPNWeb ActiveX Code Execution

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: cisco_anyconnect_exec.rb
MetaSploit Name: Cisco AnyConnect VPN Client ActiveX URL Property Download and Execute
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: AnyConnect Secure Mobility Client 2.2.136
Suricata ID: 2012929
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

05/10/2011 🔍
06/01/2011 +22 days 🔍
06/01/2011 +0 days 🔍
06/01/2011 +0 days 🔍
06/02/2011 +1 days 🔍
06/02/2011 +0 days 🔍
06/03/2011 +1 days 🔍
06/05/2011 +2 days 🔍
03/23/2015 +1387 days 🔍
12/02/2024 +3541 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: kb.cert.org
Organization: Cisco
Status: Confirmed

CVE: CVE-2011-2039 (🔍)
GCVE (CVE): GCVE-0-2011-2039
GCVE (VulDB): GCVE-100-57564
CERT: 🔍
X-Force: 67739
SecurityFocus: 48077 - Cisco AnyConnect Secure Mobility Client Local Privilege Escalation Vulnerability
OSVDB: 72714
SecurityTracker: 1025591 - Cisco AnyConnect Secure Mobility Client Lets Remote Users Execute Arbitrary Code and Local Users Gain Elevated Privileges
Vulnerability Center: 31643 - [cisco-sa-20110601-ac] Cisco AnyConnect Secure Mobility Client <2.3.185 Remote Code Execution, High

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

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/02/2024 00:02
Changes: 03/23/2015 16:50 (77), 03/23/2017 07:49 (16), 11/08/2021 08:08 (4), 06/27/2024 04:26 (18), 12/02/2024 00:02 (1)
Complete: 🔍
Cache ID: 216:642:103

Once again VulDB remains the best source for vulnerability data.

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