CVE-2023-5724 – This vulnerability in Mozilla graphics drivers ... (How to Fix)

Q: How do I fix CVE-2023-5724?

1. Open affected application. 2. Go to Help > About Firefox/Thunderbird. 3. Allow automatic update check and installation. 4. Restart application when prompted.

Q: What is the severity of CVE-2023-5724?

CVE-2023-5724 has a CVSS score of 7.5 (HIGH). This vulnerability in Mozilla graphics drivers allows attackers to cause denial of service through large draw calls. It affects Firefox versions before 119, Firefox ESR before 115.4, and Thunderbird before 115.4.1. The vulnerability could crash the affected applications when processing malicious content.

📋 TL;DR

This vulnerability in Mozilla graphics drivers allows attackers to cause denial of service through large draw calls. It affects Firefox versions before 119, Firefox ESR before 115.4, and Thunderbird before 115.4.1. The vulnerability could crash the affected applications when processing malicious content.

💻 Affected Systems

Products:

Mozilla Firefox
Mozilla Firefox ESR
Mozilla Thunderbird

Versions: Firefox < 119, Firefox ESR < 115.4, Thunderbird < 115.4.1

Operating Systems: All supported operating systems (Windows, macOS, Linux)

Default Config Vulnerable: ⚠️ Yes

Notes: All default configurations are vulnerable; no special settings required for exploitation.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete application crash leading to denial of service, potentially disrupting user workflows and requiring application restart.

🟠

Likely Case

Application instability and crashes when rendering malicious web content or emails with specially crafted graphics.

🟢

If Mitigated

No impact if patched versions are deployed; crashes may occur but won't lead to privilege escalation or data compromise.

🌐 Internet-Facing: MEDIUM - Web browsers and email clients frequently process untrusted content from the internet, but exploitation requires specific conditions.

🏢 Internal Only: LOW - Internal systems typically process trusted content, reducing exposure to malicious graphics.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires crafting specific graphics content but doesn't require authentication. No public proof-of-concept has been disclosed.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Firefox 119+, Firefox ESR 115.4+, Thunderbird 115.4.1+

Vendor Advisory: https://bugzilla.mozilla.org/show_bug.cgi?id=1836705

Restart Required: Yes

Instructions:

1. Open affected application. 2. Go to Help > About Firefox/Thunderbird. 3. Allow automatic update check and installation. 4. Restart application when prompted.

🔧 Temporary Workarounds

Disable JavaScript

all

Prevents execution of malicious JavaScript that could trigger the vulnerability

Use Content Security Policy

all

Restrict graphics sources to trusted domains only

🧯 If You Can't Patch

Restrict access to untrusted websites and email sources
Implement network filtering to block known malicious content delivery networks

🔍 How to Verify

Check if Vulnerable:

Check application version in Help > About menu and compare to vulnerable versions

Check Version:

firefox --version or thunderbird --version on Linux/macOS

Verify Fix Applied:

Confirm version is Firefox 119+, Firefox ESR 115.4+, or Thunderbird 115.4.1+

📡 Detection & Monitoring

Log Indicators:

Application crash logs with graphics driver errors
Unexpected process termination of Firefox/Thunderbird

Network Indicators:

Unusual traffic patterns to/from graphics-heavy websites
Requests to domains serving canvas/webGL content

SIEM Query:

EventID=1000 OR EventID=1001 AND ProcessName="firefox.exe" OR ProcessName="thunderbird.exe"

📊 Metadata

CVE ID: CVE-2023-5724

CVSS v3 Score: 7.5 (HIGH)

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

CWE: CWE-400

Published: October 25, 2023

Last Updated: November 21, 2024

🔗 References

https://bugzilla.mozilla.org/show_bug.cgi?id=1836705 Issue Tracking,Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.html Mailing List,Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.html Mailing List,Third Party Advisory
https://www.debian.org/security/2023/dsa-5535 Mailing List,Third Party Advisory
https://www.debian.org/security/2023/dsa-5538 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1836705 Issue Tracking,Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.html Mailing List,Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.html Mailing List,Third Party Advisory
https://www.debian.org/security/2023/dsa-5535 Mailing List,Third Party Advisory
https://www.debian.org/security/2023/dsa-5538 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/ Vendor Advisory

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🔗 Related Vulnerabilities

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