CVE-2024-9401: Mozilla Firefox buffer overflow (CVSS 9.8)

Description

Memory safety bugs present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. 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 < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox< 131.0 · ≥ 116.0 < 128.3.0 · < 115.16.0

Mozilla Thunderbird≥ 129.0 < 131.0 · < 128.3.0

Remediation

Fixed in

Mozilla Firefox≥ 131.0

Mozilla Thunderbird≥ 131.0

Patch & vendor advisories

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1872744%2C1897792%2C1911317%2C1916476Issue Tracking
https://lists.debian.org/debian-lts-announce/2024/10/msg00006.html
https://www.mozilla.org/security/advisories/mfsa2024-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-47/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-48/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-49/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-50/Vendor Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2024-9401 being actively exploited?

CVE-2024-9401 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.74%.

How severe is CVE-2024-9401?

CVE-2024-9401 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.74% probability of exploitation.

Which products are affected by CVE-2024-9401?

Affected products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2024-9401?

Upgrade affected software to a fixed version, for example Mozilla Firefox 131.0, Mozilla Thunderbird 131.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-9401 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo