Is CVE-2008-1923 in the CISA KEV catalog?

No. CVE-2008-1923 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-1923?

CVE-2008-1923 has a CVSS v2 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2008-1923?

CVE-2008-1923 has an EPSS score of 1.40% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2008-1923?

Upgrade asterisk on debian 11 to 1:1.4.19.1~dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2008-1923

HIGH

7.1

CVSS v2

NVD

Description

The IAX2 channel driver (chan_iax2) in Asterisk 1.2 before revision 72630 and 1.4 before revision 65679, when configured to allow unauthenticated calls, sends "early audio" to an unverified source IP address of a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed NEW message.

CWE-16

How to fix

Remediation Available

asteriskDebian

Fixed in:1:1.4.19.1~dfsg-1CVE-2008-1923

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.40%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Other references4

Related Vulnerabilities

Other CWE-16 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-2335	Medium	5.0	85%	-	Fix
CVE-2004-2687	High	9.3	81%	-	Fix
CVE-2006-3677	High	7.5	78%	-	Fix
CVE-2011-4404	Medium	5.0	60%	-	-
CVE-2006-0848	Medium	5.1	58%	-	-
CVE-2007-3898	Medium	6.4	55%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.