CVE-2008-3903

Severity: low (CVSS 3.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2008-09-04 · updated 2026-06-16
Weakness: CWE-200

Description

Asterisk Open Source 1.2.x before 1.2.32, 1.4.x before 1.4.24.1, and 1.6.0.x before 1.6.0.8; Asterisk Business Edition A.x.x, B.x.x before B.2.5.8, C.1.x.x before C.1.10.5, and C.2.x.x before C.2.3.3; s800i 1.3.x before 1.3.0.2; and Trixbox PBX 2.6.1, when Digest authentication and authalwaysreject are enabled, generates different responses depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames.

Affected products

asterisk P B X: 1.2, 1.2.22, 1.4.21.1, 1.6
Trixbox Pbx: 2.6.1

References

http://downloads.asterisk.org/pub/security/AST-2009-003.html
http://misel.com/?p=52
http://secunia.com/advisories/34982
http://secunia.com/advisories/37677
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://www.debian.org/security/2009/dsa-1952
http://www.securityfocus.com/bid/34353
http://www.vupen.com/english/advisories/2009/0933
https://exchange.xforce.ibmcloud.com/vulnerabilities/45059
http://downloads.asterisk.org/pub/security/AST-2009-003.html
http://misel.com/?p=52
http://secunia.com/advisories/34982

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