CVE-2023-6862

Published: 20 December 2023

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR < 115.6 and Thunderbird < 115.6.

Notes

Author	Note
tyhicks	mozjs contains a copy of the SpiderMonkey JavaScript engine
mdeslaur	starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap only appears to affect Firefox ESR and thunderbird

Author

Note

tyhicks

mozjs contains a copy of the SpiderMonkey JavaScript engine

mdeslaur

starting with Ubuntu 22.04, the firefox package is just a script
that installs the Firefox snap
only appears to affect Firefox ESR and thunderbird

Priority

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package	Release	Status
firefox Launchpad, Ubuntu, Debian	bionic	Ignored (end of standard support)
	focal	Not vulnerable (esr only)
	jammy	Not vulnerable (code not present)
	lunar	Ignored (end of life, was needs-triage)
	mantic	Not vulnerable (code not present)
	noble	Not vulnerable (code not present)
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Ignored (end of standard support)
mozjs102 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Ignored
	lunar	Ignored (end of life, was needs-triage)
	mantic	Ignored (end of life, was needs-triage)
	noble	Ignored
	trusty	Does not exist
	upstream	Ignored
	xenial	Does not exist
mozjs38 Launchpad, Ubuntu, Debian	bionic	Ignored
	focal	Does not exist
	jammy	Does not exist
	lunar	Does not exist
	mantic	Does not exist
	noble	Does not exist
	trusty	Does not exist
	upstream	Ignored
	xenial	Does not exist
mozjs52 Launchpad, Ubuntu, Debian	bionic	Ignored
	focal	Ignored
	jammy	Does not exist
	lunar	Does not exist
	mantic	Does not exist
	noble	Does not exist
	trusty	Does not exist
	upstream	Ignored
	xenial	Does not exist
mozjs68 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Ignored
	jammy	Does not exist
	lunar	Does not exist
	mantic	Does not exist
	noble	Does not exist
	trusty	Does not exist
	upstream	Ignored
	xenial	Does not exist
mozjs78 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Ignored
	lunar	Ignored (end of life, was needs-triage)
	mantic	Does not exist
	noble	Does not exist
	trusty	Does not exist
	upstream	Ignored
	xenial	Does not exist
mozjs91 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Ignored
	lunar	Does not exist
	mantic	Does not exist
	noble	Does not exist
	trusty	Does not exist
	upstream	Ignored
	xenial	Does not exist
thunderbird Launchpad, Ubuntu, Debian	bionic	Ignored (end of standard support)
	focal	Released (1:115.6.0+build2-0ubuntu0.20.04.1)
	jammy	Released (1:115.6.0+build2-0ubuntu0.22.04.1)
	lunar	Released (1:115.6.0+build2-0ubuntu0.23.04.1)
	mantic	Released (1:115.6.0+build2-0ubuntu0.23.10.1)
	noble	Released (1:115.6.0+build2-0ubuntu1)
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Ignored (end of standard support)

Severity score breakdown

Parameter	Value
Base score	8.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

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