CVE-2018-12437

low-risk
Published 2018-06-15

LibTomCrypt through 1.18.1 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Do I need to act?

-
0.08% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.9/10 Medium
PHYSICAL / HIGH complexity

Affected Products (2)

Libtomcrypt
Op-Tee

Affected Vendors

Libtom Linaro

References (4)

Third Party Advisory https://security.gentoo.org/glsa/202007-53
Exploit https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidd...
Third Party Advisory https://security.gentoo.org/glsa/202007-53
Exploit https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidd...
20
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 7/34 · Low