Description
The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.
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 | 1:6.0.24+dfsg-1 | — |
| Debian 13 | zabbix | 1:6.0.24+dfsg-1 | — |
| Debian 12 | zabbix | No fix yet | — |
| Debian 11 | zabbix | 1:5.0.44+dfsg-1+deb11u1 | DLA-3909-1 |
| Debian 10 | zabbix | 1:4.0.4+dfsg-1+deb10u4 | DLA-3717-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | zabbix | No fix yet | — |
Advisories 3
- DLA-3717-1 zabbix - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3909-1 zabbix - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2023-3167 Zabbix: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 3, 2024
References
- https://support.zabbix.com/browse/ZBX-23855
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UMFKNV5E4LG2DIZNPRWQ2ENH75H6UEQT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BYSYLA7VTHR25CBLYO5ZLEJFGU7HTHQB/
- https://lists.debian.org/debian-lts-announce/2024/01/msg00012.html