CVE-2024-2607 – This vulnerability allows attackers to execute ... (How to Fix)

Q: How do I fix CVE-2024-2607?

1. Update Firefox to version 124 or later. 2. Update Firefox ESR to version 115.9 or later. 3. Update Thunderbird to version 115.9 or later. 4. Restart the application after updating.

Q: What is the severity of CVE-2024-2607?

CVE-2024-2607 has a CVSS score of 8.1 (HIGH). This vulnerability allows attackers to execute arbitrary code on affected systems by overwriting return registers. It specifically impacts Armv7-A systems running vulnerable versions of Firefox, Firefox ESR, or Thunderbird.

📋 TL;DR

This vulnerability allows attackers to execute arbitrary code on affected systems by overwriting return registers. It specifically impacts Armv7-A systems running vulnerable versions of Firefox, Firefox ESR, or Thunderbird.

💻 Affected Systems

Products:

Firefox
Firefox ESR
Thunderbird

Versions: Firefox < 124, Firefox ESR < 115.9, Thunderbird < 115.9

Operating Systems: Linux (Armv7-A systems only)

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects Armv7-A architecture systems. Other architectures and operating systems are unaffected.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Full system compromise leading to data theft, malware installation, or complete control of the affected device.

🟠

Likely Case

Remote code execution allowing attackers to run malicious code with the privileges of the browser process.

🟢

If Mitigated

Limited impact if systems are patched or not using Armv7-A architecture.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires targeting Armv7-A systems specifically. No public exploit code has been identified.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Firefox 124+, Firefox ESR 115.9+, Thunderbird 115.9+

Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2024-12/

Restart Required: Yes

Instructions:

1. Update Firefox to version 124 or later. 2. Update Firefox ESR to version 115.9 or later. 3. Update Thunderbird to version 115.9 or later. 4. Restart the application after updating.

🔧 Temporary Workarounds

Disable JavaScript

all

Temporarily disable JavaScript execution in the browser to prevent exploitation.

Use Alternative Browser

all

Switch to an unaffected browser until patches can be applied.

🧯 If You Can't Patch

Restrict browser usage to trusted websites only
Implement network segmentation to isolate vulnerable systems

🔍 How to Verify

Check if Vulnerable:

Check browser version in About Firefox/Thunderbird menu and verify if running on Armv7-A system.

Check Version:

firefox --version or thunderbird --version

Verify Fix Applied:

Confirm browser version is Firefox 124+, Firefox ESR 115.9+, or Thunderbird 115.9+.

📡 Detection & Monitoring

Log Indicators:

Unexpected browser crashes
Suspicious process creation from browser

Network Indicators:

Unusual outbound connections from browser process

SIEM Query:

process_name:firefox AND event_type:process_start AND parent_process:firefox

📊 Metadata

CVE ID: CVE-2024-2607

CVSS v3 Score: 8.1 (HIGH)

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

CWE: CWE-123

Published: March 19, 2024

Last Updated: April 1, 2025

🔗 References

https://bugzilla.mozilla.org/show_bug.cgi?id=1879939 Exploit,Issue Tracking,Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00022.html Mailing List
https://lists.debian.org/debian-lts-announce/2024/03/msg00028.html Mailing List
https://www.mozilla.org/security/advisories/mfsa2024-12/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-13/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-14/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1879939 Exploit,Issue Tracking,Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00022.html Mailing List
https://lists.debian.org/debian-lts-announce/2024/03/msg00028.html Mailing List
https://www.mozilla.org/security/advisories/mfsa2024-12/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-13/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-14/ Vendor Advisory

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🔗 Related Vulnerabilities

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