VulnerabilityModified
CVE-2018-12437
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.
MEDIUM 4.9EPSS 0.54%
Does this matter?
Lower severity and a low EPSS score (0.54%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.9 MEDIUMCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- EPSS
- 0.54% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- libtom/libtomcrypt · trustedfirmware/op-tee
- Source
- cve@mitre.org
References
- https://security.gentoo.org/glsa/202007-53Third Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/Exploit, Technical Description, Third Party Advisory
- https://security.gentoo.org/glsa/202007-53Third Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/Exploit, Technical Description, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.