CVE-2018-12435: Infoleak
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, ecgroup/ecgroup.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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
alpine/botanto a version that resolves this vulnerability.Fixed in 2.7.0-r0
Event History
Frequently Asked Questions
What is the severity of CVE-2018-12435?
The severity of CVE-2018-12435 is medium with a CVSS score of 5.9.
How does CVE-2018-12435 affect Botan?
CVE-2018-12435 affects Botan versions 2.5.0 through 2.6.0 before 2.7.0.
What is the Return Of the Hidden Number Problem (ROHNP)?
The Return Of the Hidden Number Problem (ROHNP) is a memory-cache side-channel attack on ECDSA signatures.
What is the CWE of CVE-2018-12435?
The CWE of CVE-2018-12435 is CWE-200.
How can I fix CVE-2018-12435?
To fix CVE-2018-12435, update Botan to version 2.7.0 or higher.