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CVE-2021-31798

Status Candidate

Overview

The effective key space used to encrypt the cache in CyberArk Credential Provider prior to 12.1 has low entropy, and under certain conditions a local malicious user can obtain the plaintext of cache files.

Related Files

CyberArk Credential Provider Local Cache Decryption
Posted Sep 2, 2021
Authored by Klayton Monroe | Site korelogic.com

CyberArk Credential Providers can be configured to retain passwords, password metadata, and other application properties in a local, encrypted cache file. Under certain conditions, the effective key space used to encrypt the cache is significantly reduced. For an attacker who understands the key derivation scheme and encryption mechanics, full access to the information used to derive the encryption key is sufficient to reduce effective key space to one. Even in cases where the information is not known, the encrypted cache files will likely be unable to withstand a brute force attack. However, the severity of this issue is partially mitigated by the privilege level required (root) for access. Versions prior to 12.1 are affected.

tags | advisory, local, root
advisories | CVE-2021-31798
SHA-256 | 6ba600d5651668bd7a2786e7c90c3b163cf2bc3b791d517d99bf09f429b3691f
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