Name: CVE-2011-4597: Exposure of Sensitive Information to an Unauthorized Actor
Creator: Rapid7
Published: 2011-12-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2011-4597, CWE-200, CVSS 5.3, EPSS 0.00685

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.

CVSS Details

CVSS 3.1 Base Score: 5.3

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade asterisk	Jul 30, 2024	Dec 15, 2011
Freebsd	—	Upgrade asterisk16Upgrade asterisk18	Dec 10, 2025	Dec 9, 2011

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CVSS Details

Covered by Rapid7

Prioritize with Active Threat Intelligence