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.
Published 2011-12-15 03:57:34
Updated 2012-11-06 05:04:04
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Information leak

Threat overview for CVE-2011-4597

Top countries where our scanners detected CVE-2011-4597
Top open port discovered on systems with this issue 80
IPs affected by CVE-2011-4597 251
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2011-4597!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2011-4597

Probability of exploitation activity in the next 30 days: 1.16%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 83 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2011-4597

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
5.0
MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
NIST

CWE ids for CVE-2011-4597

References for CVE-2011-4597

Products affected by CVE-2011-4597

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