#VU56270 Inadequate Encryption Strength in Credential Provider - CVE-2021-31796

Vulnerability identifier: #VU56270

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-31796

CWE-ID: CWE-326

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Credential Provider
Client/Desktop applications / Other client software

Vendor: CyberArk

Description

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

The vulnerability exists due to the effective key space used to encrypt the passwords is significantly reduced. A remote attacker can gain access to sensitive information on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Credential Provider: before 12.1

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External links
https://www.cyberark.com/resources/blog
https://korelogic.com/Resources/Advisories/KL-001-2021-008.txt
https://seclists.org/fulldisclosure/2021/Sep/1

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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.