CVE-2018-12393

Impact:
Important
Public Date:
2018-10-23
Bugzilla:
1642183: CVE-2018-12393 Mozilla: Integer overflow during Unicode conversion while loading JavaScript

The MITRE CVE dictionary describes this issue as:

A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

Find out more about CVE-2018-12393 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (thunderbird) RHSA-2018:3531 2018-11-09
Red Hat Enterprise Linux 7 (firefox) RHSA-2018:3005 2018-10-24
Red Hat Enterprise Linux 6 (firefox) RHSA-2018:3006 2018-10-24
Red Hat Enterprise Linux 7 (thunderbird) RHSA-2018:3532 2018-11-09

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 thunderbird Not affected
Red Hat Enterprise Linux 8 firefox Not affected

Acknowledgements

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges r as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation