CVE-2018-12435 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Reference

https://botan.randombit.net/security.html https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3 https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9