https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-05T06:50:34.244123+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2011-4597 CVE-2011-4597 2026-10-05T06:50:34.246340+00:00

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.