CVE-2018-0495 Details

CVE-2018-0495

Published: 2018-06-13
Last Modified: 2020-08-24
CVE Author: NIST National Vulnerability Database
CVE Assigner: security@debian.org
Summary

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.

Analysis
Common Vulnerability Score System v2.0
Severity Low
Base Score 1.9/10
Exploit Score 3.4/10
Access Vector Local
Access Complexity Medium
Authentication None
Impact Score 2.9/10
Confidentiality Impact Partial
Availability Impact None
Integrity Impact None
Vector String AV:L/AC:M/Au:N/C:P/I:N/A:N
Common Vulnerability Score System v3.1
Severity Medium
Base Score 4.7/10
Exploit Score 1/10
Access Vector Local
Access Complexity High
Privileges Required Low
Impact Score 3.6/10
Confidentiality Impact High
Availability Impact None
Integrity Impact None
Scope Unchanged
User Interaction None
Vector String CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Products Reported
CPE Vulnerable Start Excluding
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* Yes 1.8.0 1.8.3
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* Yes - 1.7.10
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*: Yes - -
cpe:2.3:a:redhat:ansible_tower:3.3:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:a:oracle:traffic_director:11.1.1.9.0:*:*:*:*:*:*:* Yes - -
References

https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-numbe
https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=9010d1576e278a4274ad
https://dev.gnupg.org/T4011
https://www.debian.org/security/2018/dsa-4231
https://usn.ubuntu.com/3689-2/
https://usn.ubuntu.com/3689-1/
http://www.securitytracker.com/id/1041147
http://www.securitytracker.com/id/1041144
https://usn.ubuntu.com/3692-2/
https://usn.ubuntu.com/3692-1/
https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html
https://access.redhat.com/errata/RHSA-2018:3221
https://access.redhat.com/errata/RHSA-2018:3505
https://usn.ubuntu.com/3850-1/
https://usn.ubuntu.com/3850-2/
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://access.redhat.com/errata/RHSA-2019:1297
https://access.redhat.com/errata/RHSA-2019:1296
https://access.redhat.com/errata/RHSA-2019:1543
https://access.redhat.com/errata/RHSA-2019:2237

CVE ID
CVE-2018-0495
Published
2018-06-13
Modified
2020-08-24
CVSSv2.0
Low
CVSSv3.1
Medium
PCI Compliance
Fail
US-CERT Alert
No
CWE
CWE-203

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