CVE-2022-26138

CVE Published	2022-07-20
Related CWE(s)	CWE-798: Use of Hard-coded Credentials
Related Vendor(s)	atlassian
Related Product(s)	questions_for_confluence
Exploitation Reported (CISA KEV)	2022-07-29
CVSS 3 Base Score	9.8 (CRITICAL)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

The Atlassian Questions For Confluence app for Confluence Server and Data Center creates a Confluence user account in the confluence-users group with the username disabledsystemuser and a hardcoded password. A remote, unauthenticated attacker with knowledge of the hardcoded password could exploit this to log into Confluence and access all content accessible to users in the confluence-users group. This user account is created when installing versions 2.7.34, 2.7.35, and 3.0.2 of the app.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Read Sensitive Constants Within an Executable (CAPEC-191)

An adversary engages in activities to discover any sensitive constants present within the compiled code of an executable. These constants may include literal ASCII strings within the file itself, or possibly strings hard-coded into particular routines that can be revealed by code refactoring methods including static and dynamic analysis.

Try Common or Default Usernames and Passwords (CAPEC-70)

An adversary may try certain common or default usernames and passwords to gain access into the system and perform unauthorized actions. An adversary may try an intelligent brute force using empty passwords, known vendor default credentials, as well as a dictionary of common usernames and passwords. Many vendor products come preconfigured with default (and thus well-known) usernames and passwords that should be deleted prior to usage in a production environment. It is a common mistake to forget to remove these default login credentials. Another problem is that users would pick very simple (common) passwords (e.g. "secret" or "password") that make it easier for the attacker to gain access to the system compared to using a brute force attack or even a dictionary attack using a full dictionary.

References

CVE-2022-26138

Cyber Threat Graph Context

Associated CAPEC Patterns

Read Sensitive Constants Within an Executable (CAPEC-191)

Try Common or Default Usernames and Passwords (CAPEC-70)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities