VULNERABILITY INTELLIGENCE

CVE-2018-12435

CVSS score5.9 MEDIUM
EPSS probability0.50%
CISA KEVNot currently listed
Published2018-06-15
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Description

Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Weakness classification

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Primary references