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EUVD-2018-1318 · Published Jun 13, 2018
Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, 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.
Technologies
Redhat Enterprise Linux ServerCanonical Ubuntu LinuxGnupg LibgcryptRedhat Enterprise Linux WorkstationRedhat Enterprise Linux DesktopDebian Debian LinuxRedhat Ansible TowerOracle Traffic Director
Weaknesses
CWE-203
CVSS scores
- v3.04.7
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - v2.01.9
AV:L/AC:M/Au:N/C:P/I:N/A:N
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
Privilege Escalation
References
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
- http://www.securitytracker.com/id/1041144
- http://www.securitytracker.com/id/1041147
- https://access.redhat.com/errata/RHSA-2018:3221
- https://access.redhat.com/errata/RHSA-2018:3505
- https://access.redhat.com/errata/RHSA-2019:1296
Potentially impacted assets
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