Information disclosure in Digium Asterisk

CVE-2011-4597

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.

Vulnerability class: Information Disclosure

EPSS: 0.033 (87.1th percentile) — read the EPSS interpretation.

Affected products

Weakness classification (CWE)

References