Vulnerability Description
The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | 1.8.0 |
Related Weaknesses (CWE)
References
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0151.html
- http://downloads.asterisk.org/pub/security/AST-2011-013.html
- http://lists.digium.com/pipermail/asterisk-dev/2011-November/052191.html
- http://openwall.com/lists/oss-security/2011/12/09/3
- http://openwall.com/lists/oss-security/2011/12/09/4
- http://osvdb.org/77597
- http://secunia.com/advisories/47273
- http://www.debian.org/security/2011/dsa-2367
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0151.html
- http://downloads.asterisk.org/pub/security/AST-2011-013.html
- http://lists.digium.com/pipermail/asterisk-dev/2011-November/052191.html
- http://openwall.com/lists/oss-security/2011/12/09/3
- http://openwall.com/lists/oss-security/2011/12/09/4
- http://osvdb.org/77597
- http://secunia.com/advisories/47273
FAQ
What is CVE-2011-4597?
CVE-2011-4597 is a vulnerability with a CVSS score of 5.0 (MEDIUM). The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on ...
How severe is CVE-2011-4597?
CVE-2011-4597 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-4597?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk.