CVE-2018-12435
5.9
MEDIUM
CVSS 3.1
EPSS 0.07%
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.
How to fix CVE-2018-12435
To remediate CVE-2018-12435, upgrade the affected package to a fixed version below.
- —upgrade to 2.7.0-r0 or later
- —upgrade to 2.6.0-3 or later
Is CVE-2018-12435 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.7.0-r0
- from 0, < 2.6.0-3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N |