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.
Advisories
Source ID Title
Debian DSA Debian DSA DSA-2367-1 asterisk security update
EUVD EUVD EUVD-2011-4521 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

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 : Deferred

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

Modified: 2025-04-11T00:51:21.963

Link: CVE-2011-4597

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.