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Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC

🗓️ 28 Jan 2021 13:20:12Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

Mozilla advisory: garbage collection on redeclared JavaScript variables causes user-after-poison and exploitable crash.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities in Mozilla Firefox affect IBM Cloud Pak for Multicloud Management Monitoring
18 May 202111:41
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities of Mozilla Firefox (less than Firefox 78.9.0 ESR +  CVE-2021-23954) have affected Synthetic Playback Agent 8.1.4.0-8.1.4 IF13 + CP4MCM2.2
12 May 202102:42
–ibm
ALT Linux		Security fix for the ALT Linux 10 package thunderbird version 78.7.0-alt1
27 Jan 202100:00
–altlinux
ALT Linux		Security fix for the ALT Linux 10 package firefox-esr version 78.7.0-alt1
26 Jan 202100:00
–altlinux
Tenable Nessus		Amazon Linux 2 : thunderbird (ALAS-2021-1603)
19 Feb 202100:00
–nessus
Tenable Nessus		CentOS 8 : firefox (CESA-2021:0288)
1 Feb 202100:00
–nessus
Tenable Nessus		CentOS 8 : thunderbird (CESA-2021:0298)
1 Feb 202100:00
–nessus
Tenable Nessus		CentOS 7 : firefox (RHSA-2021:0290)
9 Oct 202400:00
–nessus
Tenable Nessus		CentOS 7 : thunderbird (RHSA-2021:0297)
9 Oct 202400:00
–nessus
Tenable Nessus		Debian DLA-2539-1 : firefox-esr security update
4 Feb 202100:00
–nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.9i686firefox78.7.0-2.el7_9firefox-78.7.0-2.el7_9.i686.rpm
Red Hat Enterprise Linux7.9ppc64firefox78.7.0-2.el7_9firefox-78.7.0-2.el7_9.ppc64.rpm
Red Hat Enterprise Linux7.9ppc64lefirefox78.7.0-2.el7_9firefox-78.7.0-2.el7_9.ppc64le.rpm
Red Hat Enterprise Linux7.9s390xfirefox78.7.0-2.el7_9firefox-78.7.0-2.el7_9.s390x.rpm
Red Hat Enterprise Linux7.9x86_64firefox78.7.0-2.el7_9firefox-78.7.0-2.el7_9.x86_64.rpm
Red Hat Enterprise Linux7.9ppc64firefox-debuginfo78.7.0-2.el7_9firefox-debuginfo-78.7.0-2.el7_9.ppc64.rpm
Red Hat Enterprise Linux7.9ppc64lefirefox-debuginfo78.7.0-2.el7_9firefox-debuginfo-78.7.0-2.el7_9.ppc64le.rpm
Red Hat Enterprise Linux7.9s390xfirefox-debuginfo78.7.0-2.el7_9firefox-debuginfo-78.7.0-2.el7_9.s390x.rpm
Red Hat Enterprise Linux7.9x86_64firefox-debuginfo78.7.0-2.el7_9firefox-debuginfo-78.7.0-2.el7_9.x86_64.rpm

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25 Jun 2026 10:57Current
7.3High risk
Vulners AI Score7.3
CVSS 26.8
CVSS 3.18.8
EPSS0.01196
CWE-626
JavaScript variablesGarbage collectionUse after poisonExploitable crashUser after poison
5