Multiple vulnerabilities in uftpd daemon

Published: 2020-01-06 | Updated: 2020-01-31

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-5204 CVE-2020-5221
CWE-ID	CWE-119 CWE-22
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	uftpd Server applications / File servers (FTP/HTTP)
Vendor	Joachim Nilsson

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated 31.01.2020

Added vulnerability #2

1) Buffer overflow

EUVDB-ID: #VU24401

Risk: High

CVSSv3.1:

CVE-ID: CVE-2020-5204

CWE-ID:

Exploit availability:

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in "handle_PORT" in "ftpcmd.c" file when a buffer that is 16 bytes large being filled via "sprintf()" with user input based on the format specifier string %d.%d.%d.%d. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

uftpd: 0.1 - 2.10

Fixed software versions

CPE2.3

cpe:2.3:a:joachim_nilsson:uftpd:2.10:*:*:*:*:*:*:*

External links

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00034.html
http://github.com/troglobit/uftpd/commit/0fb2c031ce0ace07cc19cd2cb2143c4b5a63c9dd
http://github.com/troglobit/uftpd/security/advisories/GHSA-wrpr-xw7q-9wvq

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

2) Path traversal

EUVDB-ID: #VU24805

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-5221