CVE-2018-12435

LOW

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.

References

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/

Details

Source: MITRE

Published: 2018-06-15

Updated: 2018-08-22

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3.0

Base Score: 5.9

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

Impact Score: 4

Exploitability Score: 1.4

Severity: MEDIUM