CVE-2023-6857: Race Condition
First published: Tue Dec 19 2023(Updated: )
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.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox ESR | <115.6 | 115.6 |
| Mozilla Thunderbird | <115.6 | 115.6 |
| redhat/firefox | <115.6 | 115.6 |
| redhat/thunderbird | <115.6 | 115.6 |
| Mozilla Firefox | <121 | 121 |
| All of | ||
| Any of | ||
| Mozilla Firefox | <121.0 | |
| Mozilla Firefox ESR | <115.6 | |
| Mozilla Thunderbird | <115.6 | |
| Any of | ||
| Apple macOS | ||
| Google Android | ||
| Linux Linux kernel | ||
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Debian Debian Linux | =12.0 | |
| ubuntu/firefox | <121.0+ | 121.0+ |
| ubuntu/thunderbird | <1:115.6.0+ | 1:115.6.0+ |
| ubuntu/thunderbird | <1:115.6.0+ | 1:115.6.0+ |
| ubuntu/thunderbird | <1:115.6.0+ | 1:115.6.0+ |
| ubuntu/thunderbird | <1:115.6.0+ | 1:115.6.0+ |
| ubuntu/thunderbird | <1:115.6.0+ | 1:115.6.0+ |
| debian/firefox | 130.0-2 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 115.15.0esr-1~deb11u1 115.14.0esr-1~deb12u1 115.15.0esr-1~deb12u1 115.15.0esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:115.15.0-1~deb11u1 1:115.12.0-1~deb12u1 1:115.15.0-1~deb12u1 1:128.1.1esr-1 1:128.2.0esr-1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1796023
- https://www.mozilla.org/security/advisories/mfsa2023-54/
- https://www.mozilla.org/security/advisories/mfsa2023-55/
- https://www.mozilla.org/security/advisories/mfsa2023-56/
- https://www.debian.org/security/2023/dsa-5581
- https://www.debian.org/security/2023/dsa-5582
- https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
- https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
- https://security.gentoo.org/glsa/202401-10
- https://launchpad.net/bugs/cve/CVE-2023-6857
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-55/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6857
- https://access.redhat.com/errata/RHSA-2024:0001
- https://access.redhat.com/errata/RHSA-2024:0002
- https://access.redhat.com/errata/RHSA-2024:0004
- https://access.redhat.com/errata/RHSA-2024:0005
- https://access.redhat.com/errata/RHSA-2024:0012
- https://access.redhat.com/errata/RHSA-2024:0011
- https://access.redhat.com/errata/RHSA-2024:0019
- https://access.redhat.com/errata/RHSA-2024:0025
- https://access.redhat.com/errata/RHSA-2024:0021
- https://access.redhat.com/errata/RHSA-2024:0024
- https://access.redhat.com/errata/RHSA-2024:0022
- https://access.redhat.com/errata/RHSA-2024:0003
- https://access.redhat.com/errata/RHSA-2024:0023
- https://access.redhat.com/errata/RHSA-2024:0026
- https://access.redhat.com/errata/RHSA-2024:0028
- https://access.redhat.com/errata/RHSA-2024:0030
- https://access.redhat.com/errata/RHSA-2024:0029
- https://access.redhat.com/errata/RHSA-2024:0027
- https://bugzilla.redhat.com/show_bug.cgi?id=2255362
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/#CVE-2023-6857
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-55/#CVE-2023-6857
- https://ubuntu.com/security/notices/USN-6562-1
- https://ubuntu.com/security/notices/USN-6563-1
- https://www.cve.org/CVERecord?id=CVE-2023-6857
- https://nvd.nist.gov/vuln/detail/CVE-2023-6857
- https://security-tracker.debian.org/tracker/CVE-2023-6857
- https://ubuntu.com/security/CVE-2023-6857
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- agent/type
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- agent/references
- agent/weakness
- collector/mozilla-advisory
- source/Mozilla
- agent/software-canonical-lookup
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2023-6857
- agent/event
- agent/description
- collector/epss-latest
- source/FIRST
- agent/epss
- agent/last-modified-date
- agent/tags
- agent/softwarecombine
- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- collector/nvd-cve
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- vendor/mozilla
- canonical/mozilla firefox esr
- canonical/mozilla thunderbird
- package-manager/redhat
- canonical/mozilla firefox
- vendor/apple
- canonical/apple macos
- vendor/google
- canonical/google android
- vendor/linux
- canonical/linux linux kernel
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- version/debian debian linux/11.0
- version/debian debian linux/12.0
- package-manager/ubuntu
- package-manager/debian