HIGH
CVE-2008-1923
CWE-16Published: April 23, 2008· Updated: Jun 16, 2026
7.1
CVSS v3.1
Official 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.
Technical Analysis
CVE-2008-1923 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityC
AV:N/AC:M/Au:N/C:N/I:N/A:C
Affected Vendors & Products
asterisk5 product(s)
asterisk appliance developer kitasterisk business editionasterisknowopen sources800i
Source: NVD CPE · 102 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
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PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
All References (8)
Quick Facts
CVE IDCVE-2008-1923
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-16
CISA KEVNo
Affected1 vendor(s)
PublishedApr 23, 2008
Related CVEs (CWE-16)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2008-1923 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.