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Vulnerability record · CVE-2006-5633 · published 31 October 2006

CVE-2006-5633: Mozilla firefox vulnerability

Mozilla · Firefox

Firefox 1.5.0.7 and 2.0, and Seamonkey 1.1b, allows remote attackers to cause a denial of service (crash) by creating a range object using createRange, calling selectNode on a DocType node (DOCUMENT_TYPE_NODE), then calling createContextualFragment on the range, which triggers a null dereference. NOTE: the original Bugtraq post mentioned that code execution was possible, but followup analysis has shown that it is only a null dereference.

5.0 CVSS 2.0 Medium EPSS 7.0% · top 6.0%
5.0CVSS 2.0 base score
7.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References, 10 tagged exploit
16 Jun 2026Last modified by NVD

Description

Firefox 1.5.0.7 and 2.0, and Seamonkey 1.1b, allows remote attackers to cause a denial of service (crash) by creating a range object using createRange, calling selectNode on a DocType node (DOCUMENT_TYPE_NODE), then calling createContextualFragment on the range, which triggers a null dereference. NOTE: the original Bugtraq post mentioned that code execution was possible, but followup analysis has shown that it is only a null dereference.

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.grok.org.uk/pipermail/full-disclosure/2006-October/050416.html Exploit
http://www.gotfault.net/research/advisory/gadv-firefox.txt ExploitVendor Advisory
http://www.securityfocus.com/archive/1/450155/100/0/threaded
http://www.securityfocus.com/archive/1/450167/100/0/threaded
http://www.securityfocus.com/archive/1/450168/100/0/threaded ExploitVendor Advisory
http://www.securityfocus.com/archive/1/450682/100/200/threaded
http://www.securityfocus.com/archive/1/452803/100/0/threaded
http://www.securityfocus.com/bid/20799
https://bugzilla.mozilla.org/show_bug.cgi?id=358797 Exploit
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=213237 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/29916
http://lists.grok.org.uk/pipermail/full-disclosure/2006-October/050416.html Exploit
http://www.gotfault.net/research/advisory/gadv-firefox.txt ExploitVendor Advisory
http://www.securityfocus.com/archive/1/450155/100/0/threaded
http://www.securityfocus.com/archive/1/450167/100/0/threaded
http://www.securityfocus.com/archive/1/450168/100/0/threaded ExploitVendor Advisory
http://www.securityfocus.com/archive/1/450682/100/200/threaded
http://www.securityfocus.com/archive/1/452803/100/0/threaded
http://www.securityfocus.com/bid/20799
https://bugzilla.mozilla.org/show_bug.cgi?id=358797 Exploit
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=213237 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/29916

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2006-5633), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.