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Vulnerability record · CVE-2005-2871 · published 9 September 2005

CVE-2005-2871: Mozilla firefox vulnerability

Mozilla · Firefox

Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and earlier, and Netscape 8.0.3.3 and 7.2, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a hostname with all "soft" hyphens (character 0xAD), which is not properly handled by the NormalizeIDN call in nsStandardURL::BuildNormalizedSpec.

7.5 CVSS 2.0 High EPSS 21% · top 2.5%
7.5CVSS 2.0 base score
21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
74References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and earlier, and Netscape 8.0.3.3 and 7.2, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a hostname with all "soft" hyphens (character 0xAD), which is not properly handled by the NormalizeIDN call in nsStandardURL::BuildNormalizedSpec.

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://archives.neohapsis.com/archives/fulldisclosure/2005-09/0316.html
http://marc.info/?l=full-disclosure&m=112624614008387&w=2
http://secunia.com/advisories/16764
http://secunia.com/advisories/16766
http://secunia.com/advisories/16767
http://secunia.com/advisories/17042
http://secunia.com/advisories/17090
http://secunia.com/advisories/17263
http://secunia.com/advisories/17284
http://securityreason.com/securityalert/83
http://securitytracker.com/id?1014877
http://www.ciac.org/ciac/bulletins/p-303.shtml
http://www.debian.org/security/2005/dsa-837
http://www.debian.org/security/2005/dsa-866
http://www.debian.org/security/2005/dsa-868
http://www.gentoo.org/security/en/glsa/glsa-200509-11.xml
http://www.kb.cert.org/vuls/id/573857 US Government Resource
http://www.mandriva.com/security/advisories?name=MDKSA-2005:174
http://www.mozilla.org/security/announce/mfsa2005-57.html
http://www.osvdb.org/19255
http://www.redhat.com/archives/fedora-legacy-announce/2006-January/msg00004.html
http://www.redhat.com/support/errata/RHSA-2005-768.html
http://www.redhat.com/support/errata/RHSA-2005-769.html
http://www.redhat.com/support/errata/RHSA-2005-791.html
http://www.securiteam.com/securitynews/5RP0B0UGVW.html
http://www.security-protocols.com/advisory/sp-x17-advisory.txt ExploitVendor Advisory
http://www.security-protocols.com/firefox-death.html Exploit
http://www.securityfocus.com/bid/14784
http://www.ubuntu.com/usn/usn-181-1
http://www.vupen.com/english/advisories/2005/1690
http://www.vupen.com/english/advisories/2005/1691
http://www.vupen.com/english/advisories/2005/1824
https://bugzilla.mozilla.org/show_bug.cgi?id=307259
https://exchange.xforce.ibmcloud.com/vulnerabilities/22207
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1287
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A584
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9608
http://archives.neohapsis.com/archives/fulldisclosure/2005-09/0316.html
http://marc.info/?l=full-disclosure&m=112624614008387&w=2
http://secunia.com/advisories/16764

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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-2005-2871), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.