SB2023092107 - Multiple vulnerabilities in Jenkins and Jenkins LTS

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2023-43494)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected application does not exclude sensitive build variables from this search. A remote user can gain unauthorized access to sensitive information on the system.

2) Incorrect default permissions (CVE-ID: CVE-2023-43498)

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to the affected plugin creates the temporary file in the system temporary directory with the default permissions for newly created files within the Jenkins API "MultipartFormDataParser". A local user can read and write the file before it is used.

3) Incorrect default permissions (CVE-ID: CVE-2023-43497)

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to the affected plugin creates the temporary file in the system temporary directory with the default permissions for newly created files within the Stapler web framework. A local user can read and write the file before it is used.

4) Incorrect default permissions (CVE-ID: CVE-2023-43496)

The vulnerability allows a local user to execute arbitrary code on the system.

The vulnerability exists due to the affected plugin creates the temporary file in the system temporary directory with the default permissions for newly created files. A local user can view contents of files and directories and execute arbitrary code on the target system.

5) Stored cross-site scripting (CVE-ID: CVE-2023-43495)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the "caption" constructor parameter of ExpandableDetailsNote. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3261
• http://www.openwall.com/lists/oss-security/2023/09/20/5
• https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3073
• https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3072
• https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3245