Vulnerability identifier: #VU28186

Vulnerability risk: High

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-13246

CWE-ID: CWE-667

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gitea
Web applications / Modules and components for CMS

Vendor: The Gitea Authors

Description

The vulnerability allows a remote attacker to perform a denial of service attack (DoS) on the target system.

The vulnerability exists due to double-locking error. A remote attacker can exploit this vulnerability to cause a deadlock, resulting in a denial of service condition.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Gitea: 1.11.0 - 1.11.5

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External links
http://github.com/go-gitea/gitea/issues/10549
http://github.com/go-gitea/gitea/pull/11438
http://www.youtube.com/watch?v=DmVgADSVS88

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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. However, proof of concept for this vulnerability is available.