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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zabbix | Zabbix | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | zabbix | 1:7.0.5+dfsg-1 | — |
| Debian 13 | zabbix | 1:7.0.5+dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | zabbix | No fix yet | — |
| Ubuntu 26.04 LTS | zabbix | No fix yet | — |
| Ubuntu 25.10 | zabbix | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 20.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 18.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 16.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 14.04 LTS | zabbix | No fix yet | — |
Advisories 2
- WID-SEC-2024-3562 Zabbix: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 10, 2025
- NCSC-2024-0462 Kwetsbaarheden verholpen in Zabbix NCSC-NL (Netherlands) · Dec 2, 2024