Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.3, 1.6.0.x before 1.6.0.17, and 1.6.1.x before 1.6.1.9; Business Edition A.x.x, B.x.x before B.2.5.12, C.2.x.x before C.2.4.5, and C.3.x.x before C.3.2.2; AsteriskNOW 1.5; and s800i 1.3.x before 1.3.0.5 generate different error messages depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames via multiple crafted REGISTER messages with inconsistent usernames in the URI in the To header and the Digest in the Authorization header.
Published 2009-11-10 18:30:00
Updated 2009-12-23 06:58:26
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Information leak

Threat overview for CVE-2009-3727

Top countries where our scanners detected CVE-2009-3727
Top open port discovered on systems with this issue 80
IPs affected by CVE-2009-3727 133
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2009-3727!
*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-2009-3727

Probability of exploitation activity in the next 30 days: 1.30%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 84 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2009-3727

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-2009-3727

References for CVE-2009-3727

Products affected by CVE-2009-3727

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