CVE-2012-4193

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-10-12 · updated 2026-06-16
Weakness: CWE-346

Description

Mozilla Firefox before 16.0.1, Firefox ESR 10.x before 10.0.9, Thunderbird before 16.0.1, Thunderbird ESR 10.x before 10.0.9, and SeaMonkey before 2.13.1 omit a security check in the defaultValue function during the unwrapping of security wrappers, which allows remote attackers to bypass the Same Origin Policy and read the properties of a Location object, or execute arbitrary JavaScript code, via a crafted web site.

Affected products

Canonical Ubuntu Linux: 10.04, 11.04, 11.10, 12.04
Mozilla Firefox: before 16.0.1; from 10.0 before 10.0.9 — fixed in 10.0.9, 16.0.1
Mozilla Seamonkey: before 2.13.1 — fixed in 2.13.1
Mozilla Thunderbird: before 16.0.1 — fixed in 16.0.1
Mozilla Thunderbird ESR: from 10.0 before 10.0.9 — fixed in 10.0.9
RedHat Enterprise Linux Desktop: 5.0, 6.0
RedHat Enterprise Linux Eus: 6.3
RedHat Enterprise Linux Server: 5.0, 6.0
RedHat Enterprise Linux Workstation: 5.0, 6.0
SUSE Linux Enterprise Server 15 SP1: 10-sp4, 11-sp2
SUSE Linux Enterprise Server: 10-sp4, 11-sp2
SUSE Linux Enterprise Software Development Kit: 10-sp4

How to fix

Upgrade to a fixed version: Mozilla Firefox 10.0.9, 16.0.1; Mozilla Seamonkey 2.13.1; Mozilla Thunderbird 16.0.1; Mozilla Thunderbird ESR 10.0.9. Check the vendor advisory for mitigations.

References

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