CVE-2024-42328: zabbix Null Dereference — Fix

Description

When the webdriver for the Browser object downloads data from a HTTP server, the data pointer is set to NULL and is allocated only in curl_write_cb when receiving data. If the server's response is an empty document, then wd->data in the code below will remain NULL and an attempt to read from it will result in a crash.

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CVSS v3.1 Score

3.3

LOW

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

Weakness Type (CWE)

CWE-476 CWE-476

CWE-690 CWE-690

Affected Products

Vendor	Product	Versions
zabbix	zabbix	7.0.0 — 7.0.4

References

Advisories & Patches

https://support.zabbix.com/browse/ZBX-25624

Frequently Asked Questions

What is CVE-2024-42328? +

When the webdriver for the Browser object downloads data from a HTTP server, the data pointer is set to NULL and is allocated only in curl_write_cb when receiving data. If the server's response is an empty document, then wd->data in the code below will remain NULL and an attempt to read from it will result in a crash. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2024-42328? +

CVE-2024-42328 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2024-42328? +

CVE-2024-42328 affects products from zabbix, specifically: zabbix. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-42328? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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