Zero-day vulnerability in Atlassian Confluence Server

Code Injection
CVE-2022-26134

Vulnerability details

Advisory: SB2022060301 - Remote code execution in Atlassian Confluence Server

Vulnerable component: Atlassian Confluence Server

CVE-ID: CVE-2022-26134

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper input validation when processing OGNL expressions. A remote non-authenticated attacker can send a specially crafted request to the Confluence Server and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

Public Exploits:

- Confluence Data Center 7.18.0 - Remote Code Execution (RCE) [Exploit-DB]

External links:

https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html


About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.