CVE Daily

CVE-2011-4597

The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6...

Medium CVSS 5.0

Overview

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.

CWE: CWE-200 Published: 2011-12-15T03:57:34.310
Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 5.0 (MEDIUM)
  • Detected tags: none (tag impact: LOW)

Recommended actions:

  • Prioritize remediation based on business criticality and exposure.
  • Limit exposure and increase monitoring until fixed.

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