Mozilla Firefox and SeaMonkey focus security bypass

firefox-focus-security-bypass (35299) The risk level is classified as MediumMedium Risk


Mozilla Firefox and SeaMonkey could allow a remote attacker to bypass security restrictions, caused by improper handling of focus JavaScript events. By persuading a victim to visit a malicious Web page, a remote attacker could exploit this vulnerability to bypass file upload field dialogs and possibly read arbitrary files on the system.


Base Score: 2.8
  Access Vector: Remote
  Access Complexity: High
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
Temporal Score: 2.2
  Exploitability: Proof-Of-Concept
  Remediation Level: Official-Fix
  Report Confidence: Confirmed


Bypass Security


Refer to MFSA 2007-32 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Apply the appropriate update for your system. See References.


  • Full-Disclosure Mailing List, Sat Jun 30 2007 - 08:38:12 CDT : New flaw found in Firefox Firefox file input focus vulnerabilities.
  • MFSA 2007-32: File input focus stealing vulnerability.
  • Mozilla Firefox Web site: Firefox - Rediscover the Web.
  • ASA-2007-447: Firefox security update (RHSA-2007-0979)
  • ASA-2007-459: seamonkey security update (RHSA-2007-0980)
  • ASA-2007-461: thunderbird security update (RHSA-2007-0981)
  • ASA-2008-008: Multiple Security Vulnerabilities in Firefox and Thunderbird for Solaris 10 May Allow Execution of Arbitrary Code and Access to Unauthorized Data (Sun 103177)
  • BID-24725: Mozilla Firefox OnKeyDown Event File Upload Vulnerability
  • CVE-2007-3511: The focus handling for the onkeydown event in Mozilla Firefox, and other versions before, and SeaMonkey before 1.1.5 allows remote attackers to change field focus and copy keystrokes via the for attribute in a label, which bypasses the focus prevention, as demonstrated by changing focus from a textarea to a file upload field.
  • DSA-1392: xulrunner -- several vulnerabilities
  • DSA-1396: iceweasel -- several vulnerabilities
  • DSA-1401: iceape -- several vulnerabilities
  • MDKSA-2007:202: Updated Firefox packages fix multiple vulnerabilities
  • OSVDB ID: 37994: Mozilla Multiple Browsers onkeydown Event Window Focus Manipulation
  • RHSA-2007-0979: Critical: firefox security update
  • RHSA-2007-0980: Critical: seamonkey security update
  • RHSA-2007-0981: Moderate: thunderbird security update
  • SA25904: Firefox "OnKeyDown" Event Focus Weakness
  • SECTRACK ID: 1018837: Mozilla Firefox May Discloses Files or Information to Remote Users
  • SUSE-SA:2007:057: Mozilla Security Update
  • USN-535-1: Firefox vulnerabilities
  • USN-536-1: Thunderbird vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Canonical Ubuntu 7.10
  • Debian Debian Linux 4.0
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • Mozilla Firefox
  • Mozilla Firefox
  • Mozilla Firefox
  • Mozilla Firefox
  • Mozilla Firefox
  • Mozilla SeaMonkey 1.1
  • Mozilla SeaMonkey 1.1 Beta
  • Mozilla SeaMonkey 1.1.0
  • Mozilla SeaMonkey 1.1.1
  • Mozilla SeaMonkey 1.1.2
  • Mozilla SeaMonkey 1.1.3
  • Mozilla SeaMonkey 1.1.4
  • Novell Linux Desktop 9
  • Novell Linux POS 9
  • Novell Open Enterprise Server
  • Novell Open Enterprise Server
  • Novell OpenSUSE 10.2
  • Novell OpenSUSE 10.3
  • Novell SUSE Linux Enterprise Desktop 10 SP1
  • Novell SUSE Linux Enterprise Server 10 SP1
  • Novell SUSE Linux Enterprise Server 10
  • Novell UnitedLinux 1.0
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4.5.z ES
  • RedHat Enterprise Linux 4.5.z AS
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux Optional Productivity Applications 5 Server
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • SuSE Linux Enterprise Server 8
  • SUSE SuSE Linux 10.0
  • SUSE SuSE Linux 10.1
  • SuSE SuSE Linux OpenExchange Server 4
  • SuSE SuSE Linux Retail Solution 8
  • SuSE SuSE Linux School Server
  • SuSE SuSE Linux Standard Server 8
  • SuSE SuSE SLES 9
  • Turbolinux Turbolinux 10 Server
  • Turbolinux Turbolinux 10 Server x64 Ed
  • Turbolinux Turbolinux FUJI


Jun 30, 2007

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