Vulnerability in Utimaco Securityserver Cse
CVE-2018-19589
Incorrect Access Controls of Security Officer (SO) in PKCS11 R2 provider that ships with the Utimaco CryptoServer HSM product package allows an SO authenticated to a slot to retrieve attributes of keys marked as private keys in external key storage, and also delete keys marked as private keys in external key storage. This compromises the availability of all keys configured with external key storage and may result in an economic attack in which the attacker denies legitimate users access to keys while maintaining possession of an encrypted copy (blob) of the external key store for ransom. This attack has been dubbed reverse ransomware attack and may be executed via a physical connection to the CryptoServer or remote connection if SSH or remote access to LAN CryptoServer has been compromised. The Confidentiality and Integrity of the affected keys, however, remain untarnished.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (49.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- support.hsm.utimaco.com/support/security-advisories/-/blogs/cve-2018-19589 (Vendor Advisory)
- www.linkedin.com/pulse/does-hsm-guarantee-cryptographic-key-security-kwadjo-nya… (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-19589?
- CVE-2018-19589 is a medium-severity vulnerability in Utimaco Securityserver Cse, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2019-04-09.
- How severe is CVE-2018-19589?
- Medium severity. CVSS v3 base score is 6.5 out of 10.