Multiple vulnerabilities in Gitlab Community Edition

1) Cross-site scripting

EUVDB-ID: #VU25035

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-7973

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 file API. A remote attacker can trick the victim to follow a specially crafted link 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

Gitlab Community Edition: 12.5.0 - 12.7.2

CPE2.3

• cpe:2.3:a:gitlab:gitlab:12.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:12.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:12.5.2:*:*:*:*:*:*:*

External links

https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/releases/2020/01/30/security-release-gitlab-12-7-4-released/
https://gitlab.com/gitlab-org/security/gitlab/issues/14

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.

2) Race condition

EUVDB-ID: #VU25102

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-16779

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information on the target system.

The vulnerability exists due to a race condition around persistent connections, where a connection which is interrupted (such as by a timeout) would leave data on the socket. A remote attacker can exploit the race and gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 5.3.0 - 12.7.2

CPE2.3

• cpe:2.3:a:gitlab:gitlab:5.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:5.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:5.4.1:*:*:*:*:*:*:*

External links

https://about.gitlab.com/releases/2020/01/30/security-release-gitlab-12-7-4-released/

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: #VU25103

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-18978

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to resource matching does not ensure that pathnames are in a canonical format when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 6.4.0 - 12.7.2

CPE2.3

• cpe:2.3:a:gitlab:gitlab:6.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:6.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:6.4.2:*:*:*:*:*:*:*

External links

https://about.gitlab.com/releases/2020/01/30/security-release-gitlab-12-7-4-released/

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.