SB2021090205 - Multiple vulnerabilities in CyberArk Credential Provider

Description

This security bulletin contains information about 3 vulnerabilities.

1) Inadequate Encryption Strength (CVE-ID: CVE-2021-31796)

CWE-ID: CWE-326 - Inadequate Encryption Strength

CVSSv4: 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

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.

2) Race condition (CVE-ID: CVE-2021-31797)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 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:U/U:Green

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a race condition in the user identification mechanism. A remote attacker can exploit the race and disclose passwords.

3) Inadequate Encryption Strength (CVE-ID: CVE-2021-31798)

CWE-ID: CWE-326 - Inadequate Encryption Strength

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the effective key space used to encrypt the cache has low entropy. A local user can obtain the plaintext of cache files.

Remediation

Install update from vendor's website.

References

• https://www.cyberark.com/resources/blog
• https://korelogic.com/Resources/Advisories/KL-001-2021-008.txt
• http://seclists.org/fulldisclosure/2021/Sep/1
• https://korelogic.com/Resources/Advisories/KL-001-2021-009.txt
• http://seclists.org/fulldisclosure/2021/Sep/2
• http://seclists.org/fulldisclosure/2021/Sep/3
• https://korelogic.com/Resources/Advisories/KL-001-2021-010.txt