What’s Vulnerable › Vulnerabilities

CVE-2009-0041

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-01-14 · updated 2026-06-16
• Weakness: CWE-200

Description

IAX2 in Asterisk Open Source 1.2.x before 1.2.31, 1.4.x before 1.4.23-rc4, and 1.6.x before 1.6.0.3-rc2; Business Edition A.x.x, B.x.x before B.2.5.7, C.1.x.x before C.1.10.4, and C.2.x.x before C.2.1.2.1; and s800i 1.2.x before 1.3.0 responds differently to a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.

Affected products

• Asterisk Business Edition: through b.2.5.2; through c.1.0; a, b.1.3.2, b.1.3.3, b.2.2.0, b.2.2.1, b.2.3.1 (+9)
• asterisk Open Source: through 1.2.30.4; through 1.4.23; through 1.6.0.3; 1.2.0, 1.2.0-beta1, 1.2.0-beta2, 1.2.0-rc1, 1.2.0-rc2, 1.2.0beta1 (+123)
• asterisk S800I Appliance: 1.2

References

• http://downloads.digium.com/pub/security/AST-2009-001.html
• http://secunia.com/advisories/33453
• http://secunia.com/advisories/34982
• http://secunia.com/advisories/37677
• http://security.gentoo.org/glsa/glsa-200905-01.xml
• http://securityreason.com/securityalert/4910
• http://www.debian.org/security/2009/dsa-1952
• http://www.securityfocus.com/archive/1/499884/100/0/threaded
• http://www.securityfocus.com/bid/33174
• http://www.securitytracker.com/id?1021549
• http://www.vupen.com/english/advisories/2009/0063
• http://downloads.digium.com/pub/security/AST-2009-001.html

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