Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2009-3727

Severity CVSS v4.0:
Pending analysis
Type:
CWE-200 Information Leak / Disclosure
Publication date:
10/11/2009
Last modified:
09/04/2025

Description

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.

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:digium:asterisk:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.0:beta1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.0:beta2:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.0:rc2:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.2:netsec:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.3:netsec:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.10:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.10:netsec:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.11:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.11:netsec:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:1.2.12:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools