Description
Firefox before 1.0 and Mozilla before 1.7.5 allows inactive (background) tabs to launch dialog boxes, which can allow remote attackers to spoof the dialog boxes from web sites in other windows and facilitate phishing attacks, aka the "Dialog Box Spoofing Vulnerability."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | devhelp +1 | 0.9.2-2.4.3 | RHSA-2005:335 |
| RHEL 4 | evolution +1 | 2.0.2-14 | RHSA-2005:335 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Multiple Browsers - Tabbed Browsing EDB-589 · remote · Oct 22, 2004 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- RHSA-2005:335 Red Hat Security Advisory: mozilla security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- RHSA-2005:323 vendor-advisory
- http://www.mozilla.org/security/announce/mfsa2005-05.html
- oval:org.mitre.oval:def:100050 vdb-entry signature
- web-browser-modal-spoofing(18864) vdb-entry
- RHSA-2005:335 vendor-advisory
- http://secunia.com/multiple_browsers_form_field_focus_test/
- 12712 third-party-advisory
- http://secunia.com/multiple_browsers_dialog_box_spoofing_test/
- oval:org.mitre.oval:def:10211 vdb-entry signature