Input validation error in Mozilla Firefox - CVE-2020-12417

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU29452

Input validation error in Mozilla Firefox - CVE-2020-12417

Published: July 2, 2020 / Updated: July 31, 2020


Vulnerability identifier: #VU29452
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-12417
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform cache poisoning attack.

The vulnerability exists due to an error when processing the %2F character in a manifest URL, which results in Firefox's AppCache behavior to become confused and allowe a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory.



Affected software

Mozilla Firefox
Gentoo Linux
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Opensuse
Ubuntu
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
thunderbird (Debian package)
firefox-esr (Debian package)
firefox (Red Hat package)
thunderbird (Red Hat package)
firefox-esr (Alpine package)
thunderbird (Alpine package)
mozjs68 (Alpine package)
firefox (Alpine package)
thunderbird (Ubuntu package)
firefox (Ubuntu package)
Mozilla Thunderbird

How to mitigate CVE-2020-12417

Install updates from vendor's website.

Mozilla Firefox - update to 78.0.1
thunderbird (Debian package) - addressed in versions 1:68.10.0-1~deb9u1, 1:68.10.0-1~deb10u1
firefox-esr (Debian package) - addressed in versions 68.10.0esr-1~deb9u1, 68.10.0esr-1~deb10u1
Mozilla Thunderbird - addressed in versions 68.10.0, 78.0
firefox (Red Hat package) - addressed in versions 68.10.0-1.el7_8, 68.10.0-1.el8_0, 68.10.0-1.el8_1, 68.10.0-1.el8_2
thunderbird (Red Hat package) - addressed in versions 68.10.0-1.el7_8, 68.10.0-1.el8_0, 68.10.0-1.el8_1, 68.10.0-1.el8_2
firefox-esr (Alpine package) - update to 68.10.0-r0
thunderbird (Alpine package) - update to 68.10.0-r0
mozjs68 (Alpine package) - update to 68.10.0-r0
firefox (Alpine package) - update to 78.0.1-r0
thunderbird (Ubuntu package) - addressed in versions 1:68.10.0+build1-0ubuntu0.16.04.1, 1:68.10.0+build1-0ubuntu0.18.04.1, 1:68.10.0+build1-0ubuntu0.19.10.1, 1:68.10.0+build1-0ubuntu0.20.04.1
firefox (Ubuntu package) - addressed in versions 78.0.1+build1-0ubuntu0.16.04.1, 78.0.1+build1-0ubuntu0.18.04.1, 78.0.1+build1-0ubuntu0.19.10.1, 78.0.1+build1-0ubuntu0.20.04.1

External References

Related Security Bulletins