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Cisco IOS Authentication Proxy for FTP/Telnet Buffer Overflow
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Secunia Advisory:
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SA16719
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Release Date:
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2005-09-08
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Last Update:
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2005-09-27
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Critical:
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Moderately critical
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Impact:
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DoS System access
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| OS: | Cisco IOS 12.x Cisco IOS R12.x
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| | CVE reference: | CVE-2005-2841 (Secunia mirror)
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Description: A vulnerability has been reported in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.
The vulnerability is caused due to a boundary error when the Authentication Proxy FTP/Telnet is processing user authentication credentials. This can be exploited to cause a buffer overflow.
Successful exploitation causes a reload of the device and may allow arbitrary code execution, but requires that Authentication Proxy for FTP and/or Telnet Sessions is configured and applied to an active interface.
The vulnerability is reported in the following versions:
* 12.2ZH and 12.2ZL based trains
* 12.3 based trains
* 12.3T based trains
* 12.4 based trains
* 12.4T based trains
Solution: Fixes are available (see patch matrix in vendor advisory).
http://www.cisco.com/warp/public/707/cisco-sa-20050907-auth_proxy.shtml#software
Provided and/or discovered by: Reported by vendor.
Changelog: 2005-09-27: Added CVE reference.
Original Advisory: http://www.cisco.com/warp/public/707/cisco-sa-20050907-auth_proxy.shtml
Other References: US-CERT VU#236045:
http://www.kb.cert.org/vuls/id/236045
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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