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CVE
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CVE-2018-0495Date: (C)2018-06-15   (M)2024-02-01


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 4.7CVSS Score : 1.9
Exploit Score: 1.0Exploit Score: 3.4
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: HIGHAccess Complexity: MEDIUM
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: HIGHAvailability: NONE
Integrity: NONE 
Availability: NONE 
  
Reference:
SECTRACK-1041144
SECTRACK-1041147
DSA-4231
RHSA-2018:3221
RHSA-2018:3505
RHSA-2019:1296
RHSA-2019:1297
RHSA-2019:1543
RHSA-2019:2237
USN-3689-1
USN-3689-2
USN-3692-1
USN-3692-2
USN-3850-1
USN-3850-2
https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html
https://dev.gnupg.org/T4011
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965
https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

CPE    9
cpe:/o:debian:debian_linux:9.0
cpe:/o:canonical:ubuntu_linux:16.04::~~lts~~~
cpe:/o:redhat:enterprise_linux_workstation:7.0
cpe:/o:redhat:enterprise_linux_desktop:7.0
...
CWE    1
CWE-203
OVAL    34
oval:org.secpod.oval:def:89002575
oval:org.secpod.oval:def:89002131
oval:org.secpod.oval:def:89002571
oval:org.secpod.oval:def:1601120
...

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