CVE-2023-4577 json
Memory corruption in JIT UpdateRegExpStatics
published 2023-09-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-54431
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
Patch / fix
- Mozilla Firefox 117
- Mozilla Firefox ESR 115.2
- Mozilla Thunderbird 115.2
- firefox-esr Debian 14, Debian 13 115.2.0esr-1
- thunderbird Debian 14, Debian 13 1:115.2.0-1
debian advisories DEBIAN-CVE-2023-4577
- firefox Ubuntu 20.04 LTS 117.0+build2-0ubuntu0.20.04.1
- thunderbird Ubuntu 20.04 LTS 1:115.3.1+build1-0ubuntu0.20.04.1
- thunderbird Ubuntu 22.04 LTS 1:115.3.1+build1-0ubuntu0.22.04.2
ubuntu advisories UBUNTU-CVE-2023-4577
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 9 102.15.0-1.el9_2
- firefox RHEL 7 102.15.0-1.el7_9
- thunderbird RHEL 7 102.15.0-1.el7_9
- firefox RHEL 8 102.15.0-1.el8_8
- thunderbird RHEL 8 102.15.0-1.el8_8
- firefox RHEL 9 102.15.0-1.el9_2
- firefox-x11 RHEL 9 102.15.0-1.el9_2
- thunderbird RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 102.15.0-1.el8_2
red hat advisories RHSA-2023:4955RHSA-2023:4946RHSA-2023:4947RHSA-2023:4948RHSA-2023:5019RHSA-2023:4945
- MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +3 more 115.2.2-150200.8.130.1
- MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.2.0-112.176.1
- MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +10 more 115.2.0-150200.152.102.1
- MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.2.0-150000.150.100.1
suse advisories SUSE-SU-2023:3664-1SUSE-SU-2023:3562-1SUSE-SU-2023:3559-1SUSE-SU-2023:3519-1
- firefox-esr openSUSE Tumbleweed 128.5.1-1.1
- MozillaFirefox openSUSE Tumbleweed 117.0-1.1
- MozillaThunderbird openSUSE Tumbleweed 115.2.0-1.1
opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13176-1openSUSE-SU-2024:13202-1
- firefox AlmaLinux 8 102.15.0-1.el8_8.alma
- thunderbird AlmaLinux 8 102.15.0-1.el8_8.alma
- thunderbird AlmaLinux 9 102.15.0-1.el9_2.alma
- firefox AlmaLinux 9 102.15.0-1.el9_2.alma
- firefox-x11 AlmaLinux 9 102.15.0-1.el9_2.alma
almalinux advisories ALSA-2023:4952ALSA-2023:4954ALSA-2023:4955ALSA-2023:4958
- firefox Rocky Linux 8 102.15.0-1.el8_8
- thunderbird Rocky Linux 8 102.15.0-1.el8_8
rocky linux advisories RLSA-2023:4952RLSA-2023:4954
- firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 115.2.0-r0
alpine advisories ALPINE-CVE-2023-4577
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-2023-4577 updated cvss 7.5
Mozilla: Memory corruption in JIT UpdateRegExpStatics
-
Red Hat Enterprise Linux 6 firefox, thunderbirdaffected: no fix planned “Out of support scope”
-
Red Hat Enterprise Linux AppStream (v. 8) firefox 102.15.0-1.el8_8, thunderbird 102.15.0-1.el8_8fixed: vendor fix RHSA-2023:4952
-
Red Hat Enterprise Linux AppStream (v. 9) firefox 102.15.0-1.el9_2, firefox-x11 102.15.0-1.el9_2, thunderbird 102.15.0-1.el9_2fixed: vendor fix RHSA-2023:4958
-
Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 102.15.0-1.el8_2, thunderbird 102.15.0-1.el8_2fixed: vendor fix RHSA-2023:4951
-
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 102.15.0-1.el8_4, thunderbird 102.15.0-1.el8_4fixed: vendor fix RHSA-2023:4957
-
Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox 102.15.0-1.el8_1, thunderbird 102.15.0-1.el8_1fixed: vendor fix RHSA-2023:4949
-
Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 102.15.0-1.el8_2, thunderbird 102.15.0-1.el8_2fixed: vendor fix RHSA-2023:4951
-
Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 102.15.0-1.el8_4, thunderbird 102.15.0-1.el8_4fixed: vendor fix RHSA-2023:4957
show 5 moreshow fewer
-
Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 102.15.0-1.el8_6fixed: vendor fix RHSA-2023:4959
-
Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 102.15.0-1.el9_0, thunderbird 102.15.0-1.el9_0fixed: vendor fix RHSA-2023:4950
-
Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 102.15.0-1.el8_2, thunderbird 102.15.0-1.el8_2fixed: vendor fix RHSA-2023:4951
-
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 102.15.0-1.el8_4, thunderbird 102.15.0-1.el8_4fixed: vendor fix RHSA-2023:4957
-
Red Hat Enterprise Linux Client (v. 7) firefox 102.15.0-1.el7_9, thunderbird 102.15.0-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 102.15.0-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 102.15.0-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 102.15.0-1.el7_9, thunderbird 102.15.0-1.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 102.15.0-1.el7_9, thunderbird 102.15.0-1.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 102.15.0-1.el7_9fixed: vendor fix RHSA-2023:5019
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
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Affected products
- Mozilla Firefox
- Mozilla Firefox ESR
- Mozilla Thunderbird
References
-
mozilla.org
/security/advisories/mfsa2023-34/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2023-36/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2023-38/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1847397
issue-tracking, permissions-required
Sources
- CVE List CVE-2023-4577
- NVD CVE-2023-4577
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.