Medium severity4.7NVD Advisory· Published Jun 15, 2018· Updated Jun 17, 2026
CVE-2018-12434
CVE-2018-12434
Description
LibreSSL before 2.6.5 and 2.7.x before 2.7.4 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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7<2.6.5, >=2.7.0 <2.7.4+ 5 more
- (no CPE)range: <2.6.5, >=2.7.0 <2.7.4
- cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*range: <2.6.5
- cpe:2.3:a:openbsd:libressl:2.7.0:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:libressl:2.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:libressl:2.7.2:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:libressl:2.7.3:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
3- ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.5-relnotes.txtnvdVendor Advisory
- ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.4-relnotes.txtnvdVendor Advisory
- www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/nvdThird Party Advisory
News mentions
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