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

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: redhat

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

Updated: 2012-09-01T09:00:00

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


Link: CVE-2011-4597

JSON object: View

cve-icon NVD Information

Status : Modified

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

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


Link: CVE-2011-4597

JSON object: View

cve-icon Redhat Information

No data.

CWE