CVE-2012-4203

Description

The New Tab page in Mozilla Firefox before 17.0 uses a privileged context for execution of JavaScript code by bookmarklets, which allows user-assisted remote attackers to run arbitrary programs by leveraging a javascript: URL in a bookmark.

Category

6.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.78% Top 20%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory mozilla.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=765628
http://www.ubuntu.com/usn/USN-1638-3 vendor advisory
http://www.ubuntu.com/usn/USN-1638-2 vendor advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html vendor advisory
http://secunia.com/advisories/51434 third party advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html vendor advisory
http://secunia.com/advisories/51439 third party advisory
http://www.securityfocus.com/bid/56623 vdb entry
http://www.ubuntu.com/usn/USN-1638-1 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html vendor advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16503 vdb entry signature
http://secunia.com/advisories/51369 third party advisory
http://www.mozilla.org/security/announce/2012/mfsa2012-95.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2012-4203?
CVE-2012-4203 has been scored as a medium severity vulnerability.
How to fix CVE-2012-4203?
To fix CVE-2012-4203, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-4203 being actively exploited in the wild?
It is possible that CVE-2012-4203 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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