CVE-2021-27927
Zabbix CSRF Authentication Bypass Vulnerability
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.
INFO
Published Date :
March 3, 2021, 5:15 p.m.
Last Modified :
April 12, 2023, 4:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2021-27927 has a 3 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-27927.
| URL | Resource |
|---|---|
| https://lists.debian.org/debian-lts-announce/2023/04/msg00013.html | |
| https://support.zabbix.com/browse/ZBX-18942 | Issue Tracking Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
POC集合，框架nday漏洞利用
None
红队作战中比较常遇到的一些重点系统漏洞整理。
redteam security hacking
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-27927 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-27927 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 12, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/04/msg00013.html [No Types Assigned] -
Modified Analysis by [email protected]
Apr. 26, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.28 *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (excluding) 5.0.8 *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 5.1.0 up to (excluding) 5.2.4 OR *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (including) 4.0.27 *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (including) 5.0.9 *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 5.2.0 up to (including) 5.2.3 -
CVE Modified by [email protected]
Mar. 29, 2021
Action Type Old Value New Value Changed Description In Zabbix before 4.0.28rc1, 5.x before 5.0.8rc1, 5.1.x and 5.2.x before 5.2.4rc1, and 5.3.x and 5.4.x before 5.4.0alpha1, the CControllerAuthenticationUpdate controller lacks a CSRF protection mechanism. The code inside this controller calls diableSIDValidation inside the init() method. 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. -
Initial Analysis by [email protected]
Mar. 18, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://support.zabbix.com/browse/ZBX-18942 No Types Assigned https://support.zabbix.com/browse/ZBX-18942 Issue Tracking, Patch, Vendor Advisory Added CWE NIST CWE-352 Added CPE Configuration OR *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.28 *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (excluding) 5.0.8 *cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:* versions from (including) 5.1.0 up to (excluding) 5.2.4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-27927 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-27927
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} -0.00%
score
0.29792
percentile