medium CVSS 5.8

CVE-2024-8929·PHP vulnerability

In PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, 8.3.* before 8.3.14, a hostile MySQL server can cause the client to disclose the content of its heap containing data from other SQL requests and possible other data belonging to different users of the same server.

Severity
medium
Software
PHP
Fixed in
8.3.14
Published

Affected versions

From: 8.3.0

Until: 8.3.14

Fixed in: 8.3.14

How to fix this CVE

PHP versions 8.3.0 through 8.3.13 contain a memory disclosure vulnerability when connecting to a compromised or hostile MySQL server. Upgrade PHP to version 8.3.14 or later to prevent unauthorized heap memory exposure that could reveal sensitive data from other SQL queries and users. This fix ensures proper memory isolation when handling MySQL protocol responses.

sudo dnf update php php-common

Defensia detects this vulnerability

How to check if you are affected

  1. Run `php -v` to check your current PHP version; versions 8.3.0–8.3.13 are vulnerable
  2. Check running PHP services with `systemctl status php-fpm` or `ps aux | grep php` to identify active PHP processes
  3. Review MySQL connection logs in `/var/log/mysql/error.log` or your application logs for unusual connection patterns or unexpected data disclosures
  4. After patching, verify the fix by running `php -v` again and confirming version 8.3.14 or higher is reported

FAQ

What is CVE-2024-8929?

CVE-2024-8929 is a memory disclosure vulnerability in PHP 8.3.x where a malicious MySQL server can trigger the client to leak heap memory contents, potentially exposing data from other SQL requests or different database users on the same server instance.

Is CVE-2024-8929 being actively exploited?

No, CVE-2024-8929 is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog, and no public exploits are available. However, the vulnerability requires direct control or compromise of the MySQL server, limiting opportunistic exploitation.

What versions of PHP are affected by CVE-2024-8929?

PHP 8.1.x before 8.1.31, PHP 8.2.x before 8.2.26, and PHP 8.3.x before 8.3.14 are affected. This advisory focuses on the 8.3 branch (8.3.0–8.3.13).

How do I check if my server is vulnerable to CVE-2024-8929?

Run `php -v` and check if the version falls within the vulnerable ranges (8.1.0–8.1.30, 8.2.0–8.2.25, or 8.3.0–8.3.13). Additionally, verify MySQL connectivity with `php -i | grep -i mysql` to confirm the vulnerable component is in use.

Does Defensia detect CVE-2024-8929?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If PHP is installed on a monitored server, CVE-2024-8929 will appear in your dashboard with remediation steps.

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References

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