CVE-2023-6857

2023-12-2000:00:00

ubuntu.com

firefox

thunderbird

symlink vulnerability

unix

firefox esr

thunderbird version

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

AI Score

6.1

Confidence

High

EPSS

0.001

Percentile

43.3%

JSON

When resolving a symlink, a race may occur where the buffer passed to
readlink may actually be smaller than necessary. This bug only affects
Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is
unaffected. This vulnerability affects Firefox ESR < 115.6, Thunderbird <
115.6, and Firefox < 121.

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

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchfirefox< 121.0+build1-0ubuntu0.20.04.1UNKNOWN
ubuntu22.04noarchmozjs102< anyUNKNOWN
ubuntu24.04noarchmozjs102< anyUNKNOWN
ubuntu18.04noarchmozjs38< anyUNKNOWN
ubuntu18.04noarchmozjs52< anyUNKNOWN
ubuntu20.04noarchmozjs52< anyUNKNOWN
ubuntu20.04noarchmozjs68< anyUNKNOWN
ubuntu22.04noarchmozjs78< anyUNKNOWN
ubuntu22.04noarchmozjs91< anyUNKNOWN
ubuntu20.04noarchthunderbird< 1:115.6.0+build2-0ubuntu0.20.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	firefox	< 121.0+build1-0ubuntu0.20.04.1	UNKNOWN
ubuntu	22.04	noarch	mozjs102	< any	UNKNOWN
ubuntu	24.04	noarch	mozjs102	< any	UNKNOWN
ubuntu	18.04	noarch	mozjs38	< any	UNKNOWN
ubuntu	18.04	noarch	mozjs52	< any	UNKNOWN
ubuntu	20.04	noarch	mozjs52	< any	UNKNOWN
ubuntu	20.04	noarch	mozjs68	< any	UNKNOWN
ubuntu	22.04	noarch	mozjs78	< any	UNKNOWN
ubuntu	22.04	noarch	mozjs91	< any	UNKNOWN
ubuntu	20.04	noarch	thunderbird	< 1:115.6.0+build2-0ubuntu0.20.04.1	UNKNOWN