| Name | CVE-2021-27927 |
| Description | In Zabbix from 4.0.x before 4.0.28rc1, 5.0.0alpha1 before 5.0.10rc1, 5.2.x before 5.2.6rc1, and 5.4.0alpha1 before 5.4.0beta2, the CControllerAuthenticationUpdate controller lacks a CSRF protection mechanism. The code inside this controller calls diableSIDValidation inside the init() method. An attacker doesn't have to know Zabbix user login credentials, but has to know the correct Zabbix URL and contact information of an existing user with sufficient privileges. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3390-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| zabbix (PTS) | buster | 1:4.0.4+dfsg-1 | vulnerable |
| buster (security) | 1:4.0.4+dfsg-1+deb10u4 | fixed | |
| bullseye | 1:5.0.8+dfsg-1 | fixed | |
| bookworm | 1:6.0.14+dfsg-1 | fixed | |
| sid | 1:6.0.25+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| zabbix | source | stretch | (not affected) | |||
| zabbix | source | buster | 1:4.0.4+dfsg-1+deb10u1 | DLA-3390-1 | ||
| zabbix | source | (unstable) | 1:5.0.8+dfsg-1 |
[stretch] - zabbix <not-affected> (Vulnerable code introduced later)
https://support.zabbix.com/browse/ZBX-18942
CControllerAuthenticationUpdate introduced by authentication revamp in https://support.zabbix.com/browse/ZBXNEXT-4573 (4.0)