CVE Vulnerabilities

CVE-2017-7756

Use After Free

Published: Jun 11, 2018 | Modified: Nov 21, 2024
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
9.8 IMPORTANT
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM

A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Firefox Mozilla * 54.0 (excluding)
Firefox_esr Mozilla * 52.2.0 (excluding)
Thunderbird Mozilla * 52.2.0 (excluding)
Red Hat Enterprise Linux 6 RedHat firefox-0:52.2.0-1.el6_9 *
Red Hat Enterprise Linux 6 RedHat thunderbird-0:52.2.0-1.el6_9 *
Red Hat Enterprise Linux 7 RedHat firefox-0:52.2.0-1.el7_3 *
Red Hat Enterprise Linux 7 RedHat thunderbird-0:52.2.0-1.el7_3 *
Firefox Ubuntu devel *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu xenial *
Firefox Ubuntu yakkety *
Firefox Ubuntu zesty *
Thunderbird Ubuntu devel *
Thunderbird Ubuntu trusty *
Thunderbird Ubuntu upstream *
Thunderbird Ubuntu xenial *
Thunderbird Ubuntu yakkety *
Thunderbird Ubuntu zesty *

Potential Mitigations

References