CVE-2023-4056 json
Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13.
published 2023-08-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-53947
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
Patch / fix
- Mozilla Firefox 116
- Mozilla Firefox ESR 102.14, 115.1
- mozilla firefox_esr 102.14, 115.1
- firefox-esr Debian 12 102.14.0esr-1~deb12u1
- firefox-esr Debian 14, Debian 13 115.1.0esr-1
- thunderbird Debian 12 1:102.14.0-1~deb12u1
- thunderbird Debian 14, Debian 13 1:115.1.0-1
debian advisories DEBIAN-CVE-2023-4056
- thunderbird Ubuntu 20.04 LTS 1:102.15.0+build1-0ubuntu0.20.04.1
- thunderbird Ubuntu 22.04 LTS 1:102.15.0+build1-0ubuntu0.22.04.1
ubuntu advisories UBUNTU-CVE-2023-4056
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- thunderbird RHEL 7 102.14.0-1.el7_9
- thunderbird RHEL 9 102.14.0-1.el9_2
- thunderbird RHEL 8 102.14.0-1.el8_8
- firefox RHEL 7 102.14.0-1.el7_9
- firefox RHEL 8 102.14.0-1.el8_8
- firefox RHEL 9 102.14.0-1.el9_2
- firefox-x11 RHEL 9 102.14.0-1.el9_2
- thunderbird RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 102.14.0-1.el8_2
red hat advisories RHSA-2023:4496RHSA-2023:4500RHSA-2023:4495RHSA-2023:4499RHSA-2023:4494RHSA-2023:4493
- MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +3 more 115.1.0-150200.8.127.1
- MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +9 more 115.1.0-150200.152.99.1
- MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLES 12 SP2-BCL +1 more 115.1.0-112.173.1
- MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.1.0-150000.150.97.1
suse advisories SUSE-SU-2023:3228-1SUSE-SU-2023:3163-1SUSE-SU-2023:3162-1SUSE-SU-2023:3161-1
- firefox-esr openSUSE Tumbleweed 128.5.1-1.1
- MozillaThunderbird openSUSE Tumbleweed 102.14.0-1.1
- MozillaFirefox openSUSE Tumbleweed 116.0.2-1.1
opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13091-1openSUSE-SU-2024:13124-1
- thunderbird AlmaLinux 8 102.14.0-1.el8_8.alma
- thunderbird AlmaLinux 9 102.14.0-1.el9_2.alma
- firefox AlmaLinux 9 102.14.0-1.el9_2.alma
- firefox-x11 AlmaLinux 9 102.14.0-1.el9_2.alma
- firefox AlmaLinux 8 102.14.0-1.el8_8.alma
almalinux advisories ALSA-2023:4497ALSA-2023:4499ALSA-2023:4462ALSA-2023:4468
- firefox Rocky Linux 9 102.14.0-1.el9_2
- thunderbird Rocky Linux 9 102.14.0-1.el9_2
- thunderbird Rocky Linux 8 102.14.0-1.el8_8
- firefox Rocky Linux 8 102.14.0-1.el8_8
rocky linux advisories RLSA-2023:4462RLSA-2023:4499RLSA-2023:4497RLSA-2023:4468
- firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 115.1.0-r0
alpine advisories ALPINE-CVE-2023-4056
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2023-4056 updated cvss 9.8
Mozilla: Memory safety bugs fixed in Firefox 116, Firefox ESR 115.1, Firefox ESR 102.14, Thunderbird 115.1, and Thunderbird 102.14
-
Red Hat Enterprise Linux 6 firefox, thunderbirdaffected: no fix planned “Out of support scope”
-
Red Hat Enterprise Linux AppStream (v. 8) firefox 102.14.0-1.el8_8, thunderbird 102.14.0-1.el8_8fixed: vendor fix RHSA-2023:4468
-
Red Hat Enterprise Linux AppStream (v. 9) firefox 102.14.0-1.el9_2, firefox-x11 102.14.0-1.el9_2, thunderbird 102.14.0-1.el9_2fixed: vendor fix RHSA-2023:4462
-
Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 102.14.0-1.el8_2, thunderbird 102.14.0-1.el8_2fixed: vendor fix RHSA-2023:4460
-
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 102.14.0-1.el8_4, thunderbird 102.14.0-1.el8_4fixed: vendor fix RHSA-2023:4469
-
Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox 102.14.0-1.el8_1, thunderbird 102.14.0-1.el8_1fixed: vendor fix RHSA-2023:4464
-
Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 102.14.0-1.el8_2, thunderbird 102.14.0-1.el8_2fixed: vendor fix RHSA-2023:4460
-
Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 102.14.0-1.el8_4, thunderbird 102.14.0-1.el8_4fixed: vendor fix RHSA-2023:4469
show 5 moreshow fewer
-
Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 102.14.0-1.el8_6, thunderbird 102.14.0-1.el8_6fixed: vendor fix RHSA-2023:4463
-
Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 102.14.0-1.el9_0, thunderbird 102.14.0-1.el9_0fixed: vendor fix RHSA-2023:4465
-
Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 102.14.0-1.el8_2, thunderbird 102.14.0-1.el8_2fixed: vendor fix RHSA-2023:4460
-
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 102.14.0-1.el8_4, thunderbird 102.14.0-1.el8_4fixed: vendor fix RHSA-2023:4469
-
Red Hat Enterprise Linux Client (v. 7) firefox 102.14.0-1.el7_9, thunderbird 102.14.0-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 102.14.0-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 102.14.0-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 102.14.0-1.el7_9, thunderbird 102.14.0-1.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 102.14.0-1.el7_9, thunderbird 102.14.0-1.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 102.14.0-1.el7_9fixed: vendor fix RHSA-2023:4461
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Mozilla Firefox
- Mozilla Firefox ESR
- mozilla firefox_esr
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
mozilla.org
/security/advisories/mfsa2023-29/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2023-30/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2023-31/
vendor-advisory
-
bugzilla.mozilla.org
/buglist.cgi?bug_id=1820587%2C1824634%2C1839235%2C1842325%2C1843847
broken-link, issue-tracking
-
debian.org
/security/2023/dsa-5464
mailing-list, third-party-advisory
-
debian.org
/security/2023/dsa-5469
mailing-list, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2023/08/msg00008.html
mailing-list, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2023/08/msg00010.html
mailing-list, third-party-advisory
Sources
- CVE List CVE-2023-4056
- NVD CVE-2023-4056
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.