CVE-2024-0743 json
An unchecked return value in TLS handshake code could have caused a potentially exploitable crash.
published 2024-01-23 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-16532
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
An unchecked return value in TLS handshake code could have caused a potentially exploitable crash. This vulnerability affects Firefox < 122, Firefox ESR < 115.9, and Thunderbird < 115.9.
Patch / fix
- Mozilla Firefox 122
- Mozilla Firefox ESR 115.9
- Mozilla Thunderbird 115.9
- nss Debian 12 2:3.87.1-1+deb12u1
- nss Debian 14, Debian 13 2:3.96.1-1
- firefox-esr Debian 12 115.9.0esr-1~deb12u1
- firefox-esr Debian 14, Debian 13 115.9.0esr-1
- thunderbird Debian 12 1:115.9.0-1~deb12u1
- thunderbird Debian 14, Debian 13 1:115.9.0-1
debian advisories DEBIAN-CVE-2024-0743
- firefox Ubuntu 20.04 LTS 122.0+build2-0ubuntu0.20.04.1
- thunderbird Ubuntu 20.04 LTS 1:115.9.0+build1-0ubuntu0.20.04.1
- thunderbird Ubuntu 22.04 LTS 1:115.9.0+build1-0ubuntu0.22.04.1
ubuntu advisories UBUNTU-CVE-2024-0743
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
- firefox RHEL 7 115.9.1-1.el7_9
- firefox RHEL 9 115.9.1-1.el9_3
- firefox-x11 RHEL 9 115.9.1-1.el9_3
- thunderbird RHEL 7 115.9.0-1.el7_9
- thunderbird RHEL 9 115.9.0-1.el9_3
- firefox RHEL 8 115.9.1-1.el8_9
- thunderbird RHEL 8 115.9.0-1.el8_9
- firefox RHEL 8.6 EUS 115.9.1-1.el8_6
red hat advisories RHSA-2024:1489RHSA-2024:1490RHSA-2024:1491RHSA-2024:1499RHSA-2024:1488RHSA-2024:1500
- MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Module for Package Hub 15 SP5, openSUSE Leap 15.5 115.9.0-150200.8.154.1
- MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +10 more 115.9.1-150200.152.131.1
- MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.9.0-112.203.2
suse advisories SUSE-SU-2024:1147-1SUSE-SU-2024:1002-1SUSE-SU-2024:0971-1
- firefox-esr openSUSE Tumbleweed 128.5.1-1.1
- MozillaFirefox openSUSE Tumbleweed 122.0-1.1
- MozillaThunderbird openSUSE Tumbleweed 115.9.0-1.1
opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13626-1openSUSE-SU-2024:13789-1
- firefox AlmaLinux 8 115.9.1-1.el8_9.alma.1
- firefox AlmaLinux 9 115.9.1-1.el9_3.alma.1
- firefox-x11 AlmaLinux 9 115.9.1-1.el9_3.alma.1
- thunderbird AlmaLinux 9 115.9.0-1.el9_3.alma.1
- thunderbird AlmaLinux 8 115.9.0-1.el8_9.alma.1
almalinux advisories ALSA-2024:1484ALSA-2024:1485ALSA-2024:1493ALSA-2024:1494
- firefox Rocky Linux 8 115.9.1-1.el8_9
- thunderbird Rocky Linux 8 115.9.0-1.el8_9
rocky linux advisories RLSA-2024:1484RLSA-2024:1494
- firefox-esr Alpine 3.19, Alpine 3.18 115.9.0-r0
alpine advisories ALPINE-CVE-2024-0743
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-2024-0743 updated cvss 7.5
Mozilla: Crash in NSS TLS method
-
Red Hat Enterprise Linux 6 firefox, thunderbirdaffected: no fix planned “Out of support scope”
-
Red Hat Enterprise Linux AppStream (v. 8) firefox 115.9.1-1.el8_9, thunderbird 115.9.0-1.el8_9fixed: vendor fix RHSA-2024:1484
-
Red Hat Enterprise Linux AppStream (v. 9) firefox 115.9.1-1.el9_3, firefox-x11 115.9.1-1.el9_3, thunderbird 115.9.0-1.el9_3fixed: vendor fix RHSA-2024:1485
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Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 115.9.1-1.el8_2, thunderbird 115.9.0-1.el8_2fixed: vendor fix RHSA-2024:1490
-
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 115.9.1-1.el8_4, thunderbird 115.9.0-1.el8_4fixed: vendor fix RHSA-2024:1491
-
Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 115.9.1-1.el8_2, thunderbird 115.9.0-1.el8_2fixed: vendor fix RHSA-2024:1490
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Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 115.9.1-1.el8_4, thunderbird 115.9.0-1.el8_4fixed: vendor fix RHSA-2024:1491
-
Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 115.9.1-1.el8_6, thunderbird 115.9.0-1.el8_6fixed: vendor fix RHSA-2024:1489
show 6 moreshow fewer
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Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 115.9.1-1.el8_8, thunderbird 115.9.0-1.el8_8fixed: vendor fix RHSA-2024:1488
-
Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 115.9.1-1.el9_0, thunderbird 115.9.0-1.el9_0fixed: vendor fix RHSA-2024:1487
-
Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 115.9.1-1.el9_2, firefox-x11 115.9.1-1.el9_2, thunderbird 115.9.0-1.el9_2fixed: vendor fix RHSA-2024:1483
-
Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 115.9.1-1.el8_2, thunderbird 115.9.0-1.el8_2fixed: vendor fix RHSA-2024:1490
-
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 115.9.1-1.el8_4, thunderbird 115.9.0-1.el8_4fixed: vendor fix RHSA-2024:1491
-
Red Hat Enterprise Linux Client (v. 7) firefox 115.9.1-1.el7_9, thunderbird 115.9.0-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 115.9.1-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 115.9.1-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 115.9.1-1.el7_9, thunderbird 115.9.0-1.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 115.9.1-1.el7_9, thunderbird 115.9.0-1.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 115.9.1-1.el7_9fixed: vendor fix RHSA-2024:1486
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
- partial
- Assessed
- 18 mo ago
Exploit prediction
1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Mozilla Firefox
- Mozilla Firefox ESR
- Mozilla Thunderbird
Classification
- Weakness
-
- CWE-252 Unchecked Return Value
References
-
mozilla.org
/security/advisories/mfsa2024-01/
release-notes, vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1867408
permissions-required
- lists.debian.org /debian-lts-announce/2024/03/msg00010.html
- mozilla.org /security/advisories/mfsa2024-13/
- mozilla.org /security/advisories/mfsa2024-14/
- lists.debian.org /debian-lts-announce/2024/03/msg00022.html
- lists.debian.org /debian-lts-announce/2024/03/msg00028.html
- lists.debian.org /debian-lts-announce/2024/10/msg00028.html
Sources
- CVE List CVE-2024-0743
- NVD CVE-2024-0743
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.