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CVE-2018-5100: Firefox before 58 may crash and be exploited

CVE-2018-5100 · published 8 years ago

Summary

Versions of Firefox older than 58 can stop working unexpectedly when a web page runs certain code, and the crash could be used by an attacker to gain control of the browser. This problem also affects Ubuntu systems that ship those older Firefox versions. Upgrade Firefox to the latest release (or the version provided by Ubuntu updates) to remove the risk.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
mozilla	firefox	<= 57.0.4 `cpe:2.3:a:mozilla:firefox::::::::`
canonical	ubuntu_linux	14.04 16.04 17.10 `cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::`

Original advisory text

A use-after-free vulnerability can occur when arguments passed to the "IsPotentiallyScrollable" function are freed while still in use by scripts. This results in a potentially exploitable crash. Th...

References

http://www.securityfocus.com/bid/102786 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040270 Third Party Advisory VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1417405 Issue Tracking Permissions Required
https://usn.ubuntu.com/3544-1/ Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-02/ Vendor Advisory

Fix within

Internet-facing 14 days

Internal 60 days

Not known to be exploited
Can be exploited automatically (estimated)
Gives an attacker partial control (estimated)

Severity

7.5 High

Exploitation

5% chance of attack within 30 days

Type

CWE-416Use After Free

Timeline

Published11 Jun 2018

Updated18 Oct 2026

First seen29 Sep 2026

Sources

CVE-2018-5100 · NVD

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