SB2021060327 - Insufficient session expiration in HashiCorp Vault

Description

This security bulletin contains information about 1 vulnerability.

1) Insufficient Session Expiration (CVE-ID: CVE-2021-32923)

CWE-ID: CWE-613 - Insufficient Session Expiration

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

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

The vulnerability exists due to application allows the renewal of nearly-expired token leases and dynamic secret leases (specifically, those within 1 second of their maximum TTL), which caused them to be incorrectly treated as non-expiring during subsequent use. A remote non-authenticated attacker can obtain or guess session token and gain unauthorized access to session that belongs to another user.

Remediation

Install update from vendor's website.

References

• https://www.hashicorp.com/blog/category/vault/
• https://discuss.hashicorp.com/t/hcsec-2021-15-vault-renewed-nearly-expired-leases-with-incorrect-non-expiring-ttls/24603