Which products and versions are affected by CVE-2008-3263?

Affected: Asterisk versions 0.1.0, 0.1.1, 0.1.10, 0.1.11, 0.1.12, 0.1.2, 0.1.3, 0.1.4. The full list is in the CVE brief.

Is CVE-2008-3263 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2008-3263 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2008-3263?

Public exploit code is available.

Is there a fix for CVE-2008-3263?

Fixed versions are available, including Asterisk 1:1.4.21.2~dfsg-1.

How urgently should CVE-2008-3263 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Request A Demo

WatchlistHigh

CVE-2008-3263Asterisk Vulnerability

Published Jul 22, 2008 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2008-3263

Key Facts

Patch immediately

CVE-2008-3263 is a high-severity vulnerability (CVSS 7.8 v2) affecting Asterisk.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 28% probability of exploitation in the next 30 days.
Fixed versions are available, including Asterisk 1:1.4.21.2~dfsg-1.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

7.8

AV:N/AC:L/Au:N/C:N/I:N/A:C

EPSS (30-day exploit likelihood)

28%

Higher than 98.0% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

35/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttps://security-tracker.debian.org/tracker/CVE-2008-3263

Description

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.

Affected Products

114 affected entries in total

Product	Affected versions	Fixed in
AsteriskAsterisk	0.1.0, 0.1.1, 0.1.10, 0.1.11, 0.1.12, 0.1.2, 0.1.3, 0.1.4	1:1.4.21.2~dfsg-1

Patched Releases

Asterisk

1:1.4.21.2~dfsg-1

Timeline

Publicly disclosed
Jul 22, 2008
Last updated
Aug 4, 2026

Weakness Type

CWE-399

References

advisorysecurity-tracker.debian.org · CVE-2008-3263
exploitdownloads.securityfocus.com · 30321.pl
exploitExploitDB-32095
exploit30321
otherdownloads.digium.com · AST-2008-010.html

9 more references in the full CVE brief

FAQ

Common Questions.

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-…
Affected: Asterisk versions 0.1.0, 0.1.1, 0.1.10, 0.1.11, 0.1.12, 0.1.2, 0.1.3, 0.1.4. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Asterisk 1:1.4.21.2~dfsg-1.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2008-3263 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.