Security Advisory

CVE-2011-4597

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2011-12-15 02:00:00

Last updated 2024-08-07 00:09:19

Assigner redhat

CVSS score not scored

State PUBLISHED

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.

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