#VU11130 Authentication bypass in Paramiko - CVE-2018-7750

Vulnerability identifier: #VU11130

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-7750

CWE-ID: CWE-592

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Paramiko
Client/Desktop applications / Encryption software

Vendor: Jeff Forcier

Description
The vulnerability allows a remote unauthenticated attacker to bypass authentication.

The weakness exists is due to improper security restrictions. A remote attacker can use a customized SSH client, bypass authentication and gain unauthorized access to resources on the target systemю

Mitigation
Update to versions 2.4.1, 2.3.2, 2.2.3, 2.1.5, 2.0.8, 1.18.5 or 1.17.6.

Vulnerable software versions

Paramiko: 1.17 - 2.4.0

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External links
https://github.com/paramiko/paramiko/commit/fa29bd8446c8eab237f5187d28787727b4610516

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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.