Privilege escalation in Git

1) Privilege escalation

EUVDB-ID: #VU6933

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-8386

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to gain elevated privileges on the target system.

The weakness exists due to an error when handling command-line options for the restricted set of git-shell commands. A remote attacker can use a repository name that starts with a - (dash) character to bypass git-shell restrictions and gain elevated privileges.

Successful exploitation of the vulnerability results in access to the system and information disclosure.

Mitigation

Update to version 2.13.0.

Vulnerable software versions

Git: 2.4 - 2.12.3

CPE2.3

• cpe:2.3:a:git:git:2.4.12:*:*:*:*:*:*:*
• cpe:2.3:a:git:git:2.5.6:*:*:*:*:*:*:*
• cpe:2.3:a:git:git:2.6.7:*:*:*:*:*:*:*
• cpe:2.3:a:git:git:2.7.5:*:*:*:*:*:*:*
• cpe:2.3:a:git:git:2.8.5:*:*:*:*:*:*:*
• cpe:2.3:a:git:git:2.9.4:*:*:*:*:*:*:*
• cpe:2.3:a:git:git:2.12.3:*:*:*:*:*:*:*

External links

https://git.kernel.org/pub/scm/git/git.git/commit/?id=3ec804490a265f4c418a321428c12f3f18b7eff5

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.