Vulnerability identifier: #VU25651

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-9274

CWE-ID: CWE-824

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Pure-FTPd
Server applications / File servers (FTP/HTTP)

Vendor: PureFTPd.org

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to access to an uninitialized pointer in init_aliases() function in diraliases.c when processing liked. A remote user with ability to create aliases can crash the server.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Pure-FTPd: 0.96 - 1.0.49

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External links
http://github.com/jedisct1/pure-ftpd/commit/8d0d42542e2cb7a56d645fbe4d0ef436e38bcefa
http://www.pureftpd.org/project/pure-ftpd/news/

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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.