CVE-2008-3263: n/a vulnerability

CVE-2008-3263: The IAX2 protocol implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.2...

The IAX2 protocol implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B.x.x before B.2.5.4, and C.x.x before C.1.10.3; AsteriskNOW; Appliance Developer Kit 0.x.x; and s800i 1.0.x before 1.2.0.1 allows remote attackers to cause a denial of service (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 09:28 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can let a remote attacker disrupt vulnerable Asterisk voice systems by overwhelming IAX2 handling with rapid POKE requests. The expected impact is service outage, not data theft. Organizations still running the listed legacy Asterisk, Business Edition, AsteriskNOW, ADK, or s800i versions should treat exposure as urgent. Exposure is most likely where IAX2 is enabled and reachable from untrusted networks on affected legacy Asterisk-based systems. Internal-only PBX deployments still matter if attackers can reach the voice network. Prioritize remediation for internet-facing or business-critical PBX systems because exploitation can interrupt voice availability. Lower priority may be reasonable for isolated systems with IAX2 disabled, but legacy versions should still be removed. Mitigation focus: Upgrade Asterisk Open Source past 1.2.30 or 1.4.21.2 where applicable.; Upgrade Business Edition past B.2.5.4 or C.1.10.3 where applicable.; Upgrade s800i 1.0.x to 1.2.0.1 or later..

Prepared: Jun 28, 2026, 18:33 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 22, 2008, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
asterisk-poke-dos(43942)CVE reference · vdb-entry, x_refsource_XF
FEDORA-2008-6676CVE reference · vendor-advisory, x_refsource_FEDORA

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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