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Vulnerability record · CVE-2007-0021 · published 23 January 2007

CVE-2007-0021: Apple ichat vulnerability

Apple · Ichat

Format string vulnerability in Apple iChat 3.1.6 allows remote attackers to cause a denial of service (null pointer dereference and application crash) and possibly execute arbitrary code via format string specifiers in an aim:// URI.

7.5 CVSS 2.0 High EPSS 23% · top 2.3%
7.5CVSS 2.0 base score
23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
22References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Format string vulnerability in Apple iChat 3.1.6 allows remote attackers to cause a denial of service (null pointer dereference and application crash) and possibly execute arbitrary code via format string specifiers in an aim:// URI.

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

Affected products

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

References

LinkTags
http://docs.info.apple.com/article.html?artnum=305102
http://lists.apple.com/archives/Security-announce/2007/Feb/msg00000.html
http://osvdb.org/32715
http://projects.info-pull.com/moab/MOAB-20-01-2007.html ExploitVendor Advisory
http://secunia.com/advisories/24198
http://www.kb.cert.org/vuls/id/794752 US Government Resource
http://www.securityfocus.com/bid/22146
http://www.securitytracker.com/id?1017661
http://www.us-cert.gov/cas/techalerts/TA07-047A.html US Government Resource
http://www.vupen.com/english/advisories/2007/0274
https://exchange.xforce.ibmcloud.com/vulnerabilities/31679
http://docs.info.apple.com/article.html?artnum=305102
http://lists.apple.com/archives/Security-announce/2007/Feb/msg00000.html
http://osvdb.org/32715
http://projects.info-pull.com/moab/MOAB-20-01-2007.html ExploitVendor Advisory
http://secunia.com/advisories/24198
http://www.kb.cert.org/vuls/id/794752 US Government Resource
http://www.securityfocus.com/bid/22146
http://www.securitytracker.com/id?1017661
http://www.us-cert.gov/cas/techalerts/TA07-047A.html US Government Resource
http://www.vupen.com/english/advisories/2007/0274
https://exchange.xforce.ibmcloud.com/vulnerabilities/31679

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Related vulnerabilities

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

7.8CVE-2007-0614Apple ichat vulnerabilityThe Bonjour functionality in mDNSResponder, iChat 3.1.6, and InstantMessage framework 428 in Apple Mac OS X 10.4.8 allows remote attackers to cause a…EPSS 8.6%7.5CVE-2004-0873Apple ichat vulnerabilityApple iChat AV 2.1, AV 2.0, and 1.0.1 allows remote attackers to execute arbitrary programs via a "link" that references the program.EPSS 1.3%6.8CVE-2007-3746Apple ichat vulnerabilityThe Java interface to CoreAudio on Apple Mac OS X 10.3.9 and 10.4.10 does not properly check the bounds of heap read and write operations, which allo…EPSS 3.4%6.8CVE-2007-3747Apple ichat vulnerabilityThe Java interface to CoreAudio on Apple Mac OS X 10.3.9 and 10.4.10 does not restrict object instantiation and manipulation to valid heap addresses,…EPSS 3.4%5.4CVE-2007-3748Apple ichat vulnerabilityBuffer overflow in the UPnP IGD (Internet Gateway Device Standardized Device Control Protocol) implementation in iChat on Apple Mac OS X 10.3.9 and 1…EPSS 2.2%5.0CVE-2007-0613Apple ichat vulnerabilityThe Bonjour functionality in mDNSResponder, iChat 3.1.6, and InstantMessage framework 428 in Apple Mac OS X 10.4.8 does not check for duplicate entri…EPSS 7.4%2.1CVE-2007-0710Apple ichat vulnerabilityThe Bonjour functionality in iChat in Apple Mac OS X 10.3.9 allows remote attackers to cause a denial of service (persistent application crash) via u…EPSS 3.4%

Source: NIST National Vulnerability Database (record CVE-2007-0021), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.