Multiple vulnerabilities in Jenkins and Jenkins LTS

1) Information disclosure

EUVDB-ID: #VU80935

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-43494

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jenkins: 2.0 - 2.423

Jenkins LTS: 2.7.1 - 2.414.1

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Incorrect default permissions

EUVDB-ID: #VU80942

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-43498

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jenkins: 1 - 240

Jenkins LTS: 1.409.1 - 2.414.1

External links

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

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Incorrect default permissions

EUVDB-ID: #VU80941

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-43497

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jenkins: 1 - 240

Jenkins LTS: 1.409.1 - 2.414.1

External links

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

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Incorrect default permissions

EUVDB-ID: #VU80937

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-43496

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jenkins: 1 - 240

Jenkins LTS: 1.409.1 - 2.414.1

External links

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

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Stored cross-site scripting

EUVDB-ID: #VU80936

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-43495

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jenkins: 1 - 240

Jenkins LTS: 1.409.1 - 2.414.1

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.