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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2011-12-15T02:00:00

Updated: 2024-08-07T00:09:19.309Z

Reserved: 2011-11-29T00:00:00

Link: CVE-2011-4597

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2011-12-15T03:57:34.310

Modified: 2012-11-06T05:04:03.563

Link: CVE-2011-4597

cve-icon Redhat

No data.