CVE-2018-12433

MEDIUM 4.9CVE-2018-12433 · Published 15/06/2018 · updated 17/06/2026

In short

CVE-2018-12433 is a MEDIUM (CVSS 4.9) vulnerability affecting cryptlib (cryptlib).
Chance of exploitation in the next 30 days (EPSS): 0.34%, higher than 27.7% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
cryptlib cryptlib	`≤ 3.4.4`	No fix yet

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

References

nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem · Exploit

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