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Vulnerability record · CVE-2008-5558 · published 17 December 2008

CVE-2008-5558: Asterisk business edition improper authentication vulnerability

Asterisk · Asterisk Business Edition

Asterisk Open Source 1.2.26 through 1.2.30.3 and Business Edition B.2.3.5 through B.2.5.5, when realtime IAX2 users are enabled, allows remote attackers to cause a denial of service (crash) via authentication attempts involving (1) an unknown user or (2) a user using hostname matching.

4.3 CVSS 2.0 Medium EPSS 2.0% · top 20.4% CWE-287 · Improper authentication
4.3CVSS 2.0 base score
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
20References
16 Jun 2026Last modified by NVD

Description

Asterisk Open Source 1.2.26 through 1.2.30.3 and Business Edition B.2.3.5 through B.2.5.5, when realtime IAX2 users are enabled, allows remote attackers to cause a denial of service (crash) via authentication attempts involving (1) an unknown user or (2) a user using hostname matching.

AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://downloads.digium.com/pub/security/AST-2008-012.html
http://osvdb.org/50675
http://secunia.com/advisories/32956 Vendor Advisory
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://securityreason.com/securityalert/4769
http://www.securityfocus.com/archive/1/499117/100/0/threaded
http://www.securityfocus.com/bid/32773
http://www.securitytracker.com/id?1021378
http://www.vupen.com/english/advisories/2008/3403
http://downloads.digium.com/pub/security/AST-2008-012.html
http://osvdb.org/50675
http://secunia.com/advisories/32956 Vendor Advisory
http://secunia.com/advisories/34982
http://security.gentoo.org/glsa/glsa-200905-01.xml
http://securityreason.com/securityalert/4769
http://www.securityfocus.com/archive/1/499117/100/0/threaded
http://www.securityfocus.com/bid/32773
http://www.securitytracker.com/id?1021378
http://www.vupen.com/english/advisories/2008/3403

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2008-5558), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.