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Fencer Vulns
medium 6.1

CVE-2024-7524 json

Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection.

published 2024-08-06 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-48431

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.

Patch / fix

  • Mozilla Firefox 129
  • Mozilla Firefox ESR 115.14, 128.1
  • firefox-esr Debian 12 115.14.0esr-1~deb12u1
  • firefox-esr Debian 14, Debian 13 115.14.0esr-1

debian advisories DEBIAN-CVE-2024-7524

  • firefox Ubuntu 20.04 LTS 129.0.1+build1-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2024-7524

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 9 115.14.0-2.el9_4
  • firefox-x11 RHEL 9 115.14.0-2.el9_4
  • firefox RHEL 8 115.14.0-2.el8_10
  • firefox RHEL 9.2 EUS 115.14.0-2.el9_2
  • firefox-x11 RHEL 9.2 EUS 115.14.0-2.el9_2
  • firefox RHEL 8.8 EUS 115.14.0-2.el8_8
  • firefox RHEL 9.0 E4S 115.14.0-2.el9_0
  • firefox RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 115.14.0-2.el8_6

red hat advisories RHSA-2024:5322RHSA-2024:5391RHSA-2024:5328RHSA-2024:5329RHSA-2024:5327RHSA-2024:5326

  • MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128.1.0-150200.152.146.1
  • MozillaFirefox-branding-SLE SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128-150200.9.16.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 128.1.0-112.221.1
  • MozillaFirefox-branding-SLE SLES for SAP 12 SP5, SLES 12 SP5 128-35.15.1

suse advisories SUSE-SU-2024:3003-1SUSE-SU-2024:2876-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 129.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:14260-1

  • firefox AlmaLinux 9 115.14.0-2.el9_4.alma.1
  • firefox-x11 AlmaLinux 9 115.14.0-2.el9_4.alma.1
  • firefox AlmaLinux 8 115.14.0-2.el8_10.alma.1

almalinux advisories ALSA-2024:5322ALSA-2024:5391

  • firefox Rocky Linux 8 115.14.0-2.el8_10

rocky linux advisories RLSA-2024:5391

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-2024-7524 updated cvss 6.1

mozilla: CSP strict-dynamic bypass using web-compatibility shims

  • Red Hat Enterprise Linux 6 firefox
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 115.14.0-2.el8_10
    fixed: vendor fix RHSA-2024:5391
  • Red Hat Enterprise Linux AppStream (v. 9) firefox 115.14.0-2.el9_4, firefox-x11 115.14.0-2.el9_4
    fixed: vendor fix RHSA-2024:5322
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 115.14.0-2.el8_2
    fixed: vendor fix RHSA-2024:5323
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 115.14.0-2.el8_4
    fixed: vendor fix RHSA-2024:5325
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 115.14.0-2.el8_6
    fixed: vendor fix RHSA-2024:5326
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 115.14.0-2.el8_4
    fixed: vendor fix RHSA-2024:5325
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 115.14.0-2.el8_6
    fixed: vendor fix RHSA-2024:5326
show 7 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 115.14.0-2.el9_0
    fixed: vendor fix RHSA-2024:5327
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 115.14.0-2.el8_8
    fixed: vendor fix RHSA-2024:5329
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 115.14.0-2.el9_2, firefox-x11 115.14.0-2.el9_2
    fixed: vendor fix RHSA-2024:5328
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 115.14.0-2.el8_4
    fixed: vendor fix RHSA-2024:5325
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 115.14.0-2.el8_6
    fixed: vendor fix RHSA-2024:5326
  • Red Hat Enterprise Linux Server (v. 7 ELS) firefox 115.14.0-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) firefox 115.14.0-2.el7_9
    fixed: vendor fix RHSA-2024:5324
  • Red Hat Enterprise Linux 6 thunderbird Red Hat Enterprise Linux 7 thunderbird Red Hat Enterprise Linux 8 thunderbird Red Hat Enterprise Linux 9 thunderbird
    not affected: vulnerable code not present

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

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.