Vulnerability Details : CVE-2009-3727
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.
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.
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attack surface intelligence
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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
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2009-3727
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00838.html
-
http://www.securitytracker.com/id?1023133
-
http://downloads.asterisk.org/pub/security/AST-2009-008.html
Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=533137
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00789.html
-
http://www.securityfocus.com/bid/36924
Patch
- https://bugzilla.redhat.com/show_bug.cgi?id=523277
- http://www.debian.org/security/2009/dsa-1952
Products affected by CVE-2009-3727
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- cpe:2.3:a:digium:asterisk:1.4.0:*:*:*:*:*:*:*
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- cpe:2.3:a:digium:asterisk:1.2.21.1:*:*:*:*:*:*:*
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- cpe:2.3:a:digium:asterisk:1.4.5:*:*:*:*:*:*:*
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- cpe:2.3:a:digium:asterisk:1.6.0.16:*:*:*:*:*:*:*
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