Cisco Firewall Services Module SIP denial of service
| cisco-fwsm-sip-dos (32501) |  Low Risk |
Description:
Cisco Firewall Services Module (FWSM) is vulnerable to a denial of service caused by improper handling of malformed SIP messages. If deep packet inspection of SIP messages is enabled, a remote attacker could send malformed SIP messages to cause the device to reload.
Note: By default SIP inspection is enabled in the 2.3.x series and before. SIP in the 3.x series and later is disabled by default.
Platforms Affected:
- Cisco, ASA 5500 6.3
- Cisco, ASA 5500 7.0
- Cisco, ASA 5500 7.1
- Cisco, ASA 5500 7.2
- Cisco, PIX 500 6.3
- Cisco, PIX 500 7.0
- Cisco, PIX 500 7.1
- Cisco, PIX 500 7.2
Remedy:
Refer to cisco-sa-20070214-fwsm for patch, upgrade, or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- cisco-sa-20070214-fwsm, Cisco Security Advisory: Multiple Vulnerabilities in Firewall Services Module at http://www.cisco.com/warp/public/707/cisco-sa-20070214-fwsm.shtml.
- BID-22561: Cisco Multiple Products Multiple Remote Denial Of Service Vulnerabilities
- BID-22562: Cisco PIX/ASA Privilege Escalation Vulnerability
- CVE-2007-0961: Cisco PIX 500 and ASA 5500 Series Security Appliances 6.x before 6.3(5.115), 7.0 before 7.0(5.2), and 7.1 before 7.1(2.5), and the FWSM 3.x before 3.1(3.24), when the inspect sip option is enabled, allows remote attackers to cause a denial of service (device reboot) via malformed SIP packets.
- SA24160: Cisco PIX and ASA Privilege Escalation and Denial of Service
- SA24179: Cisco PIX SIP Inspection Denial of Service
- SA24180: Cisco Firewall Services Module SIP DoS and ACL Corruption
- SECTRACK ID: 1017651: Cisco ASA Lets Remote Users Deny Service and Remote Authenticated Users Gain Elevated Privileges
- SECTRACK ID: 1017652: Cisco PIX Firewall Lets Remote Users Deny Service and Remote Authenticated Users Gain Elevated Privileges
- US-CERT VU#430969: Cisco Firewall Services Module vulnerable to DoS via inspection of malformed SIP messages
- VUPEN/ADV-2007-0608: Cisco PIX and ASA Multiple Denial of Service and Privilege Escalation Vulnerabilities
Reported:
Feb 14, 2007
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