CVE-2007-3763

Exp

The IAX2 channel driver (chan_iax2) in Asterisk before 1.2.22 and 1.4.x before 1.4.8, Business Edition before B.2.2.1, AsteriskNOW before beta7, Appliance Developer Kit before 0.5.0, and s800i before 1.0.2 allows remote attackers to cause a denial of service (crash) via a crafted (1) LAGRQ or (2) LAGRP frame that contains information elements of IAX frames, which results in a NULL pointer dereference when Asterisk does not properly set an associated variable.

Published: 2007-07-18 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-3763 is rated High Exploit Risk (70.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 26.56%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.38% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2007-3763

EDB-ID Source Kind Published Link
4249 exploit_db edb 2007-07-31 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2007-3763

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 25.18% 26.56% +1.38%
2 2026-03-06 24.48% 25.18% +0.71%
3 2025-10-02 — 24.48% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-3763

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2007-3763

OS Trackers for CVE-2007-3763

vendor priority summary link
debian not yet assigned CVE-2007-3763 not yet assigned priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2007-3763
gentoo high CVE-2007-3763: 1 GLSA(s) (200802-11), 1 atom(s) (net-misc/asterisk); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-3763
ubuntu medium CVE-2007-3763 medium priority: Ubuntu including 1 source packages (asterisk), 9 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 6, ignored 3. https://ubuntu.com/security/CVE-2007-3763

Affected software / configurations for CVE-2007-3763

Vendor Product Version Raw CPE
asterisk asterisk 1.0 cpe:2.3:a:asterisk:asterisk:1.0:*:*:*:*:*:*:*
asterisk asterisk 1.0.6 cpe:2.3:a:asterisk:asterisk:1.0.6:*:*:*:*:*:*:*
asterisk asterisk 1.0.7 cpe:2.3:a:asterisk:asterisk:1.0.7:*:*:*:*:*:*:*
asterisk asterisk 1.0.8 cpe:2.3:a:asterisk:asterisk:1.0.8:*:*:*:*:*:*:*
asterisk asterisk 1.0.9 cpe:2.3:a:asterisk:asterisk:1.0.9:*:*:*:*:*:*:*
asterisk asterisk 1.0.10 cpe:2.3:a:asterisk:asterisk:1.0.10:*:*:*:*:*:*:*
asterisk asterisk 1.0.11 cpe:2.3:a:asterisk:asterisk:1.0.11:*:*:*:*:*:*:*
asterisk asterisk 1.0.12 cpe:2.3:a:asterisk:asterisk:1.0.12:*:*:*:*:*:*:*
asterisk asterisk 1.2.0_beta1 cpe:2.3:a:asterisk:asterisk:1.2.0_beta1:*:*:*:*:*:*:*
asterisk asterisk 1.2.0_beta2 cpe:2.3:a:asterisk:asterisk:1.2.0_beta2:*:*:*:*:*:*:*
asterisk asterisk 1.2.5 cpe:2.3:a:asterisk:asterisk:1.2.5:*:*:*:*:*:*:*
asterisk asterisk 1.2.6 cpe:2.3:a:asterisk:asterisk:1.2.6:*:*:*:*:*:*:*
asterisk asterisk 1.2.7 cpe:2.3:a:asterisk:asterisk:1.2.7:*:*:*:*:*:*:*
asterisk asterisk 1.2.8 cpe:2.3:a:asterisk:asterisk:1.2.8:*:*:*:*:*:*:*
asterisk asterisk 1.2.9 cpe:2.3:a:asterisk:asterisk:1.2.9:*:*:*:*:*:*:*
asterisk asterisk 1.2.10 cpe:2.3:a:asterisk:asterisk:1.2.10:*:*:*:*:*:*:*
asterisk asterisk 1.2.11 cpe:2.3:a:asterisk:asterisk:1.2.11:*:*:*:*:*:*:*
asterisk asterisk 1.2.12 cpe:2.3:a:asterisk:asterisk:1.2.12:*:*:*:*:*:*:*
asterisk asterisk 1.2.13 cpe:2.3:a:asterisk:asterisk:1.2.13:*:*:*:*:*:*:*
asterisk asterisk 1.2.14 cpe:2.3:a:asterisk:asterisk:1.2.14:*:*:*:*:*:*:*
asterisk asterisk 1.2.15 cpe:2.3:a:asterisk:asterisk:1.2.15:*:*:*:*:*:*:*
asterisk asterisk 1.2.16 cpe:2.3:a:asterisk:asterisk:1.2.16:*:*:*:*:*:*:*
asterisk asterisk 1.2.17 cpe:2.3:a:asterisk:asterisk:1.2.17:*:*:*:*:*:*:*
asterisk asterisk 1.4.1 cpe:2.3:a:asterisk:asterisk:1.4.1:*:*:*:*:*:*:*
asterisk asterisk 1.4.2 cpe:2.3:a:asterisk:asterisk:1.4.2:*:*:*:*:*:*:*
asterisk asterisk 1.4.4_2007-04-27 cpe:2.3:a:asterisk:asterisk:1.4.4_2007-04-27:*:*:*:*:*:*:*
asterisk asterisk 1.4_beta cpe:2.3:a:asterisk:asterisk:1.4_beta:*:*:*:*:*:*:*
asterisk asterisk a cpe:2.3:a:asterisk:asterisk:a:*:business:*:*:*:*:*
asterisk asterisk b.1.3.2 cpe:2.3:a:asterisk:asterisk:b.1.3.2:*:business:*:*:*:*:*
asterisk asterisk b.1.3.3 cpe:2.3:a:asterisk:asterisk:b.1.3.3:*:business:*:*:*:*:*
asterisk asterisk b.2.2.0 cpe:2.3:a:asterisk:asterisk:b.2.2.0:*:business:*:*:*:*:*
asterisk asterisk_appliance_developer_kit <= 0.4 cpe:2.3:a:asterisk:asterisk_appliance_developer_kit:*:*:*:*:*:*:*:*
asterisk asterisknow beta_5 cpe:2.3:a:asterisk:asterisknow:beta_5:*:*:*:*:*:*:*
asterisk asterisknow beta_6 cpe:2.3:a:asterisk:asterisknow:beta_6:*:*:*:*:*:*:*
asterisk s800i_appliance 1.0 cpe:2.3:h:asterisk:s800i_appliance:1.0:*:*:*:*:*:*:*
asterisk s800i_appliance 1.0.1 cpe:2.3:h:asterisk:s800i_appliance:1.0.1:*:*:*:*:*:*:*

References for CVE-2007-3763

cvelogic Threat Intelligence