CVE-2018-12435

Public Exploit

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.15%
Third-Party Advisory randombit.net Third-Party Advisory github.com Third-Party Advisory nccgroup.trust
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2018-12435?
CVE-2018-12435 has been scored as a medium severity vulnerability.
How to fix CVE-2018-12435?
To fix CVE-2018-12435, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-12435 being actively exploited in the wild?
It is possible that CVE-2018-12435 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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