← Vulnerability feed

Vulnerability record · CVE-2007-4924 · published 8 October 2007

CVE-2007-4924: Ekiga improper input validation vulnerability

Ekiga · Ekiga

The Open Phone Abstraction Library (opal), as used by (1) Ekiga before 2.0.10 and (2) OpenH323 before 2.2.4, allows remote attackers to cause a denial of service (crash) via an invalid Content-Length header field in Session Initiation Protocol (SIP) packets, which causes a \0 byte to be written to an "attacker-controlled address."

5.0 CVSS 2.0 Medium EPSS 11% · top 4.3% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
44References
16 Jun 2026Last modified by NVD

Description

The Open Phone Abstraction Library (opal), as used by (1) Ekiga before 2.0.10 and (2) OpenH323 before 2.2.4, allows remote attackers to cause a denial of service (crash) via an invalid Content-Length header field in Session Initiation Protocol (SIP) packets, which causes a \0 byte to be written to an "attacker-controlled address."

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2007-10/msg00006.html
http://mail.gnome.org/archives/ekiga-list/2007-September/msg00103.html Patch
http://openh323.cvs.sourceforge.net/openh323/opal/src/sip/sippdu.cxx?r1=2.83.2.19&r2=2.83.2.20
http://osvdb.org/41637
http://secunia.com/advisories/27118 PatchVendor Advisory
http://secunia.com/advisories/27128 PatchVendor Advisory
http://secunia.com/advisories/27129 PatchVendor Advisory
http://secunia.com/advisories/27271
http://secunia.com/advisories/27524
http://secunia.com/advisories/28380
http://www.mandriva.com/security/advisories?name=MDKSA-2007:205
http://www.redhat.com/support/errata/RHSA-2007-0957.html Patch
http://www.s21sec.com/avisos/s21sec-037-en.txt
http://www.securityfocus.com/archive/1/482120/30/4500/threaded
http://www.securityfocus.com/bid/25955
http://www.securitytracker.com/id?1018776
http://www.ubuntu.com/usn/usn-562-1
http://www.vupen.com/english/advisories/2007/3413
http://www.vupen.com/english/advisories/2007/3414
https://bugzilla.redhat.com/show_bug.cgi?id=296371
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11398
https://www.exploit-db.com/exploits/9240
http://lists.opensuse.org/opensuse-security-announce/2007-10/msg00006.html
http://mail.gnome.org/archives/ekiga-list/2007-September/msg00103.html Patch
http://openh323.cvs.sourceforge.net/openh323/opal/src/sip/sippdu.cxx?r1=2.83.2.19&r2=2.83.2.20
http://osvdb.org/41637
http://secunia.com/advisories/27118 PatchVendor Advisory
http://secunia.com/advisories/27128 PatchVendor Advisory
http://secunia.com/advisories/27129 PatchVendor Advisory
http://secunia.com/advisories/27271
http://secunia.com/advisories/27524
http://secunia.com/advisories/28380
http://www.mandriva.com/security/advisories?name=MDKSA-2007:205
http://www.redhat.com/support/errata/RHSA-2007-0957.html Patch
http://www.s21sec.com/avisos/s21sec-037-en.txt
http://www.securityfocus.com/archive/1/482120/30/4500/threaded
http://www.securityfocus.com/bid/25955
http://www.securitytracker.com/id?1018776
http://www.ubuntu.com/usn/usn-562-1
http://www.vupen.com/english/advisories/2007/3413

Track CVE-2007-4924 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2007-1007Ekiga vulnerabilityFormat string vulnerability in GnomeMeeting 1.0.2 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbit…EPSS 7.1%10.0CVE-2007-1006Ekiga vulnerabilityMultiple format string vulnerabilities in the gm_main_window_flash_message function in Ekiga before 2.0.5 allow attackers to cause a denial of servic…EPSS 3.7%8.8CVE-2011-1830Ekiga code injection vulnerabilityEkiga versions before 3.3.0 attempted to load a module from /tmp/ekiga_test.so.EPSS 0.79%5.0CVE-2012-5621Ekiga improper input validation vulnerabilitylib/engine/components/opal/opal-call.cpp in ekiga before 4.0.0 allows remote attackers to cause a denial of service (crash) via an OPAL connection wi…EPSS 2.8%5.0CVE-2007-4897Ekiga vulnerabilitypwlib, as used by Ekiga 2.0.5 and possibly other products, allows remote attackers to cause a denial of service (application crash) via a long argume…EPSS 11%4.3CVE-2013-1864Opalvoip portable tool library memory buffer overflow vulnerabilityThe Portable Tool Library (aka PTLib) before 2.10.10, as used in Ekiga before 4.0.1, does not properly detect recursion during entity expansion, whic…EPSS 2.9%9.5CVE-2026-88771Citrix netscaler application delivery controller improper input validation vulnerabilityImproper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-…KEV9.5CVE-2026-93952Arista velocloud orchestrator improper input validation vulnerabilityVeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality an…KEVEPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2007-4924), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.