NTLMv2 hash disclosure in Jupyter Server

1) Information disclosure

EUVDB-ID: #VU99615

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-35178

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the application exposes the NTLMv2 password hash of the Windows user running. A remote attacker can obtain the hash and use it to compromise the affected system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jupyter Server: 0.0.1 - 2.14.0

CPE2.3

• cpe:2.3:a:jupyter:jupyter_server:0.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:jupyter:jupyter_server:0.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:jupyter:jupyter_server:0.0.3:*:*:*:*:*:*:*

External links

https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-hrw6-wg82-cm62
https://github.com/jupyter-server/jupyter_server/commit/79fbf801c5908f4d1d9bc90004b74cfaaeeed2df

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.