CVE-2011-2039: Input Validation
First published: Thu Jun 02 2011(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco AnyConnect | <=2.3 | |
| Cisco AnyConnect | =2.0 | |
| Cisco AnyConnect | =2.1 | |
| Cisco AnyConnect | =2.2 | |
| Cisco AnyConnect | =2.2.128 | |
| Cisco AnyConnect | =2.2.133 | |
| Cisco AnyConnect | =2.2.136 | |
| Cisco AnyConnect | =2.2.140 | |
| Microsoft Windows | ||
| Windows Mobile Connectivity Tools |
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Reference Links
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080b80123.shtml
- http://www.securitytracker.com/id?1025591
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=909
- http://www.kb.cert.org/vuls/id/490097
- http://osvdb.org/72714
- http://securityreason.com/securityalert/8272
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67739
Frequently Asked Questions
What is the severity of CVE-2011-2039?
CVE-2011-2039 is classified as a medium severity vulnerability due to the potential for remote code execution.
How do I fix CVE-2011-2039?
To fix CVE-2011-2039, upgrade the Cisco AnyConnect Secure Mobility Client to the latest version available.
Which versions of Cisco AnyConnect are affected by CVE-2011-2039?
CVE-2011-2039 affects Cisco AnyConnect Secure Mobility Client versions prior to 2.3.185.
What type of attack is associated with CVE-2011-2039?
CVE-2011-2039 allows remote attackers to execute arbitrary code by exploiting the lack of authenticity verification in a downloaded executable.
Is CVE-2011-2039 a problem for Windows Mobile users?
Yes, CVE-2011-2039 also affects users on Windows Mobile using the vulnerable version of Cisco AnyConnect.
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