Multiple vulnerabilities in AsyncSSH

Published: 2024-01-03

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-46445 CVE-2023-46446
CWE-ID	CWE-345
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	AsyncSSH Server applications / Remote management servers, RDP, SSH
Vendor	Ron Fredericks, LectureMaker

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Insufficient verification of data authenticity

EUVDB-ID: #VU84954

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-46445

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to missing verification of data authenticity. A remote attacker can control the extension info message (RFC 8308) via a man-in-the-middle attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

AsyncSSH: 0.1.0 - 2.14.0

CPE2.3

External links

https://github.com/ronf/asyncssh/security/advisories/GHSA-cfc2-wr2v-gxm5
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ME34ROZWMDK5KLMZKTSA422XVJZ7IMTE/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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.

2) Insufficient verification of data authenticity

EUVDB-ID: #VU84953