CVE-2018-12433
CVE-2018-12433 is a medium-severity vulnerability in Cryptlib with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.
Key facts
- Severity: Medium (CVSS 3.x base score 4.9)
- CVSS v2: 1.9
- EPSS exploit prediction: 0% (27th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-200
- Affected product: Cryptlib
- Published:
- Last modified:
Description
cryptlib through 3.4.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. NOTE: the vendor does not include side-channel attacks within its threat model
Frequently asked questions
- What is CVE-2018-12433?
- cryptlib through 3.4.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. NOTE: the vendor does not include side-channel attacks within its threat model
- How severe is CVE-2018-12433?
- CVE-2018-12433 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over physical access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2018-12433 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-12433?
- CVE-2018-12433 affects Cryptlib. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-12433?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-12433 published?
- CVE-2018-12433 was published on 2018-06-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cryptlib:cryptlib:*:*:*:*:*:*:*:*
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