HOME VULNERABILITIESCVE-2007-4103

HIGH

CVE-2007-4103

CWE-772Published: July 31, 2007· Updated: Jun 16, 2026

7.5

CVSS v3.1

Official Description

The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released.

Technical Analysis

CVE-2007-4103 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

digium2 product(s)

asteriskasterisk appliance developer kit

Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://bugs.gentoo.org/show_bug.cgi?id=185713

PATCHhttp://ftp.digium.com/pub/asa/ASA-2007-018.pdf

PATCHhttp://secunia.com/advisories/26274

PATCHhttp://bugs.gentoo.org/show_bug.cgi?id=185713

PATCHhttp://ftp.digium.com/pub/asa/ASA-2007-018.pdf

PATCHhttp://secunia.com/advisories/26274

ADVISORYhttp://security.gentoo.org/glsa/glsa-200802-11.xml

ADVISORYhttp://www.securityfocus.com/archive/1/475069/100/0/threaded

ADVISORYhttp://www.securityfocus.com/bid/24950

ADVISORYhttp://www.securitytracker.com/id?1018472

ADVISORYhttp://security.gentoo.org/glsa/glsa-200802-11.xml

ADVISORYhttp://www.securityfocus.com/archive/1/475069/100/0/threaded

ADVISORYhttp://www.securityfocus.com/bid/24950

ADVISORYhttp://www.securitytracker.com/id?1018472

All References (22)

→

http://bugs.gentoo.org/show_bug.cgi?id=185713Issue Tracking · Patch

→

http://ftp.digium.com/pub/asa/ASA-2007-018.pdfBroken Link · Patch

→

http://osvdb.org/38197Broken Link

→

http://secunia.com/advisories/26274Broken Link · Patch · Vendor Advisory

→

http://secunia.com/advisories/29051Broken Link

→

http://security.gentoo.org/glsa/glsa-200802-11.xmlThird Party Advisory

→

http://securityreason.com/securityalert/2960Broken Link

→

http://www.securityfocus.com/archive/1/475069/100/0/threadedBroken Link · Third Party Advisory · VDB Entry

→

http://www.securityfocus.com/bid/24950Broken Link · Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id?1018472Broken Link · Third Party Advisory · VDB Entry

→

http://www.vupen.com/english/advisories/2007/2701Broken Link

→

http://bugs.gentoo.org/show_bug.cgi?id=185713Issue Tracking · Patch

→

http://ftp.digium.com/pub/asa/ASA-2007-018.pdfBroken Link · Patch

→

http://osvdb.org/38197Broken Link

→

http://secunia.com/advisories/26274Broken Link · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2007-4103

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-772

CISA KEVNo

Affected1 vendor(s)

PublishedJul 31, 2007

Related CVEs (CWE-772)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2007-4103 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.

← All Vulnerabilities·Search for CVE-2007-4103·NVD