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CVE-2012-2493

Status Candidate

Overview

The VPN downloader implementation in the WebLaunch feature in Cisco AnyConnect Secure Mobility Client 2.x before 2.5 MR6 on Windows, and 2.x before 2.5 MR6 and 3.x before 3.0 MR8 on Mac OS X and Linux, does not properly validate binaries that are received by the downloader process, which allows remote attackers to execute arbitrary code via vectors involving (1) ActiveX or (2) Java components, aka Bug ID CSCtw47523.

Related Files

Zero Day Initiative Advisory 12-156
Posted Aug 23, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-156 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Cisco AnyConnect VPN Client. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists due to insufficient signature checks with the Cisco AnyConnect VPN Client. When the client is invoked through the ActiveX control it downloads and checks a file called vpndownloader.exe. This file has to be properly signed by Cisco. Once this file is downloaded it is run and downloads additional configuration files. Within the downloaded config file it is possible to force a download of executable files. Those files are not properly checked for valid certificates and are run on the host as soon as they are downloaded.

tags | advisory, remote, arbitrary, activex
systems | cisco
advisories | CVE-2012-2493
SHA-256 | bb507fe8757aaf4a980506dd8a097f561be4b5b256078e3bd81e13cc1436b65e
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