Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C
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Cisco Small Business Voice Gateways and Analog Telephone Adapters (ATAs) and Cisco Small Business SPA 500 Series IP Phones contain a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.
The vulnerability is due to a lack of sanitization of user-supplied input in the SIP INVITE request FROM field. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted SIP INVITE message with injected exploit code. If the user visits the device's web management console (Call Log), the attacker could execute arbitrary script code in the user's browser in the security context of the affected site.
Proof-of-concept code is publicly available.
Cisco has confirmed this vulnerability and released updated software.
To exploit this vulnerability, an attacker must inject a crafted SIP message into the network, which may require access to trusted, internal network resources. This access requirement reduces the exposure of this vulnerability. Additionally, the attacker must then provide a link via e-mail, instant messaging, or another form of communication that directs a user to the affected device's Call Log web page and use misleading language or instructions to persuade the user to follow the provided link.
This vulnerability was discovered by Alexander Zaitsev and Gleb Gritsai, Positive Research Center (Positive Technologies Company).
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Cisco has confirmed the vulnerability in the following bug IDs: CSCtr27277, CSCtr27256, CSCtr27274, and CSCtr14715
Vulnerable Products
The following Cisco products are vulnerable:
- Cisco SPA8000 8-port IP Telephony Gateway versions prior to 6.1.11
- Cisco SPA8800 IP Telephony Gateway versions prior to 6.1.11
- Cisco SPA2102 phone adapter with router versions prior to 5.2.13
- Cisco SPA3102 Voice Gateway with router versions prior to 5.2.13
- Cisco Small Business SPA 500 Series IP Phones versions prior to 7.4.9
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 are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.
The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software:
Understanding Cross-Site Scripting (XSS) Threat VectorsUsers should verify that unsolicited links are safe to follow.
Administrators are advised to monitor affected systems.
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Cisco will be releasing fixed software versions:
- Cisco SPA8000 8-port IP Telephony Gateway 6.1.11
- Cisco SPA8800 IP Telephony Gateway 6.1.11 (GW)
- Cisco SPA2102 Phone Adapter with Router 5.2.13
- Cisco SPA3102 Voice Gateway with Router 5.2.13
- Cisco Small Business SPA500 Series IP Phones 7.4.9
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco.
Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.If the information is not clear, please contact the Cisco Small Business Support Center at 1-866-606-1866 (toll free from within North America), 1-408-418-1866 (toll call from anywhere in the world), or your contracted maintenance provider 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 Initial Release NA Final 2012-Jun-12
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