#VU31212 Race condition in gitolite - CVE-2018-16976

Vulnerability identifier: #VU31212

Vulnerability risk: High

CVSSv4.0: 6.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-16976

CWE-ID: CWE-362

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gitolite
Other software / Other software solutions

Vendor: sitaramc (Sitaram Chamarty)

Description

The vulnerability allows a remote authenticated user to read and manipulate data.

Gitolite before 3.6.9 does not (in certain configurations involving @all or a regex) properly restrict access to a Git repository that is in the process of being migrated until the full set of migration steps has been completed. This can allow valid users to obtain unintended access.

Mitigation
Install update from vendor's website.

Vulnerable software versions

gitolite: 3.6.2 - 3.6.8

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External links
https://bugs.debian.org/908699
https://github.com/sitaramc/gitolite/commit/dc13dfca8fdae5634bb0865f7e9822d2a268ed59
https://groups.google.com/forum/#!topic/gitolite-announce/WrwDTYdbfRg

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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.