Multiple vulnerabilities in Jenkins and Jenkins LTS
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-21682 CVE-2014-3577 CVE-2021-21683 |
| CWE-ID | CWE-42 CWE-295 CWE-22 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Jenkins Server applications / Application servers Jenkins LTS Server applications / Application servers |
| Vendor | Jenkins |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Path Equivalence
EUVDB-ID: #VU57147
Risk: Medium
CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-21682
CWE-ID:
CWE-42 - Path Equivalence
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to improper handling of equivalent directory names on Windows. A remote authenticated attacker can change or replace configurations of jobs and other entities.
MitigationInstall update from vendor's website.
Vulnerable software versionsJenkins: 2.0 - 2.314
Jenkins LTS: 2.7.1 - 2.303.1
External linkshttp://jenkins.io/security/advisory/2021-10-06/
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) Improper Certificate Validation
EUVDB-ID: #VU57150
Risk: Low
CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2014-3577
CWE-ID:
CWE-295 - Improper Certificate Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to improper certificate validation. A remote attacker can perform a man-in-the-middle (MitM) attack and spoof SSL servers via a "CN=" string in a field in the distinguished name (DN) of a certificate.
MitigationInstall update from vendor's website.
Vulnerable software versionsJenkins: 2.0 - 2.314
Jenkins LTS: 2.7.1 - 2.303.1
External linkshttp://jenkins.io/security/advisory/2021-10-06/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Path traversal
EUVDB-ID: #VU57148
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-21683
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences on Windows. A remote authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsJenkins: 2.0 - 2.314
Jenkins LTS: 2.7.1 - 2.303.1
External linkshttp://jenkins.io/security/advisory/2021-10-06/
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.
