Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C
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A vulnerability in the web framework of Cisco AsyncOS could allow an unauthenticated, remote attacker to inject a crafted HTTP header that could cause a web page redirection to a malicious website.
The vulnerability is due to insufficient validation of user input before it is used as an HTTP header value. An attacker could exploit this vulnerability by persuading a user to access a crafted URL.
This vulnerability was reported to Cisco by Glafkos Charalambous.
Proof-of-concept code that demonstrates an exploit of this vulnerability is publicly available.
Cisco has confirmed the vulnerability in a security notice and released software updates.
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the link.
Cisco indicates through the CVSS score that functional exploit code exists. Proof-of-concept exploit code is publicly available.
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Customers are advised to consult Cisco bug IDs CSCur44412, CSCur44415, CSCur89630, CSCur89636, CSCur89633, and CSCur89639 for affected product versions.
Vulnerable Products
At the time this alert was first published, the following Cisco products running Cisco AsyncOS Software were vulnerable:
- Cisco Email Security Appliance (ESA) 8.5 and prior
- Cisco Content Security Management Appliance (SMA) 8.3 and prior
- Cisco Web Security Appliance (WSA) 8.5 and prior
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to apply the appropriate updates.
Users should verify that unsolicited links are safe to follow.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Cisco AsyncOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to conduct a web page redirection attack. Updates are available. NA Final 2015-Feb-23
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