Denial of service in ProFTPD

1) Out-of-bounds read

EUVDB-ID: #VU84847

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-51713

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the make_ftp_cmd() function in main.c. A remote user can pass a specially crafted command to the server, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ProFTPD: 1.2.0 - 1.3.8 rc4

CPE2.3

• cpe:2.3:a:proftpd:proftpd:1.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:proftpd:proftpd:1.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:proftpd:proftpd:1.2.2:*:*:*:*:*:*:*

External links

https://github.com/proftpd/proftpd/issues/1683
https://github.com/proftpd/proftpd/issues/1683#issuecomment-1712887554
https://github.com/proftpd/proftpd/blob/1.3.8/NEWS

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.