CVE Vulnerabilities

CVE-2019-11756

Use After Free

Published: Jan 08, 2020 | Modified: Nov 21, 2024
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
7.1 MODERATE
CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM

Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited to a denial of service). This vulnerability affects Firefox < 71.

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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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 * 71.0 (excluding)
Red Hat Enterprise Linux 7 RedHat nspr-0:4.25.0-2.el7_9 *
Red Hat Enterprise Linux 7 RedHat nss-0:3.53.1-3.el7_9 *
Red Hat Enterprise Linux 7 RedHat nss-softokn-0:3.53.1-6.el7_9 *
Red Hat Enterprise Linux 7 RedHat nss-util-0:3.53.1-1.el7_9 *
Red Hat Enterprise Linux 7.4 Advanced Update Support RedHat nss-softokn-0:3.28.3-10.el7_4 *
Red Hat Enterprise Linux 7.4 Telco Extended Update Support RedHat nss-softokn-0:3.28.3-10.el7_4 *
Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions RedHat nss-softokn-0:3.28.3-10.el7_4 *
Red Hat Enterprise Linux 7.6 Extended Update Support RedHat nss-0:3.36.0-9.el7_6 *
Red Hat Enterprise Linux 7.6 Extended Update Support RedHat nss-softokn-0:3.36.0-7.el7_6 *
Red Hat Enterprise Linux 7.7 Extended Update Support RedHat nss-softokn-0:3.44.0-9.el7_7 *
Red Hat Enterprise Linux 8 RedHat nspr-0:4.25.0-2.el8_2 *
Red Hat Enterprise Linux 8 RedHat nss-0:3.53.1-11.el8_2 *
Red Hat OpenShift Do RedHat openshiftdo/odo-init-image-rhel7:1.1.3-2 *
Firefox Ubuntu bionic *
Firefox Ubuntu devel *
Firefox Ubuntu disco *
Firefox Ubuntu eoan *
Firefox Ubuntu focal *
Firefox Ubuntu groovy *
Firefox Ubuntu hirsute *
Firefox Ubuntu impish *
Firefox Ubuntu jammy *
Firefox Ubuntu kinetic *
Firefox Ubuntu lunar *
Firefox Ubuntu mantic *
Firefox Ubuntu noble *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu xenial *
Mozjs38 Ubuntu bionic *
Mozjs38 Ubuntu esm-apps/bionic *
Mozjs38 Ubuntu upstream *
Mozjs52 Ubuntu bionic *
Mozjs52 Ubuntu disco *
Mozjs52 Ubuntu eoan *
Mozjs52 Ubuntu esm-apps/focal *
Mozjs52 Ubuntu esm-infra/bionic *
Mozjs52 Ubuntu focal *
Mozjs52 Ubuntu groovy *
Mozjs52 Ubuntu upstream *
Mozjs60 Ubuntu disco *
Mozjs60 Ubuntu eoan *
Mozjs60 Ubuntu upstream *

Potential Mitigations

References