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CVE-2005-2871

Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and...

7.5 HighPublic exploitFix available

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.

Exploit likelihood

21.1%Down 28.0 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2005-2871
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2005-2871
Updated
2026-11-02
EUVDEUVD-2005-2872 No score

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.

Record
EUVD-2005-2872
Updated
2026-11-03
GitHub AdvisoriesGHSA-h4c5-jq2c-gq8v No score

Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and...

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.

Record
GHSA-h4c5-jq2c-gq8v
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mozilla-firefox
Debian:3.1
 before 1.0.4-2sarge4, plus listed versions
1.0.4-21.0.4-2sarge11.0.4-2sarge21.0.4-2sarge3
1.0.4-2sarge4
mozilla
Debian:3.0
From an advisory covering 8 CVEs
 All versions, plus listed versions
2:1.0.0-0.woody.12:1.7.10-12:1.7.11-12:1.7.12-12:1.7.12-1.1
Show 22 moreShow less
2:1.7.12-1.22:1.7.13-0.12:1.7.13-0.22:1.7.13-0.32:1.7.5-12:1.7.6-12:1.7.7-12:1.7.7-22:1.7.8-12:1.7.8-1sarge12:1.7.8-1sarge102:1.7.8-1sarge22:1.7.8-1sarge32:1.7.8-1sarge52:1.7.8-1sarge62:1.7.8-1sarge72:1.7.8-1sarge7.12:1.7.8-1sarge7.2.12:1.7.8-1sarge7.2.22:1.7.8-1sarge7.3.12:1.7.8-1sarge82:1.7.8-1sarge9
 None known
mozilla
Debian:3.1
From an advisory covering 8 CVEs
 before 1:1.7.8-1sarge3
1:1.7.8-1sarge3
mozilla-thunderbird
Debian:3.1
From an advisory covering 9 CVEs
 before 1.0.2-2.sarge1.0.7, plus listed versions
1.0.2-21.0.2-2.sarge1.0.6
1.0.2-2.sarge1.0.7
firefox
Red Hat:enterprise_linux:4::as
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
firefox-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
firefox
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
firefox-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
firefox
Red Hat:enterprise_linux:4::es
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
firefox-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
Show 10 moreShow less
Affected packages
PackageAffectedFixed
firefox
Red Hat:enterprise_linux:4::ws
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
firefox-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:1.0.6-1.4.2
0:1.0.6-1.4.2
thunderbird
Red Hat:enterprise_linux:4::as
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird
Red Hat:enterprise_linux:4::desktop
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird
Red Hat:enterprise_linux:4::es
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird
Red Hat:enterprise_linux:4::ws
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 8 CVEs
 before 0:1.0.7-1.4.1
0:1.0.7-1.4.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBMozilla Browsers - 0xAD (HOST:) Remote Heap Buffer Overrun (2)2005-09-22

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2005-2871 is a high vulnerability (CVSS 7.5) in Mozilla Firefox, published September 9, 2005. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 21.1%, the 97th percentile. Fixed in mozilla-firefox 1.0.4-2sarge4.

References

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