National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2018-0495 Detail

Current Description

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.

Source:  MITRE
Description Last Modified:  06/13/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 4.7 MEDIUM
Vector: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.0

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 1.9 LOW
Vector: (AV:L/AC:M/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.4

Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securitytracker.com/id/1041144 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041147 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3221
https://dev.gnupg.org/T4011 Patch Third Party Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=9010d1576e278a4274ad3f4aa15776c28f6ba965 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html Third Party Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html Third Party Advisory
https://usn.ubuntu.com/3689-1/ Third Party Advisory
https://usn.ubuntu.com/3689-2/ Third Party Advisory
https://usn.ubuntu.com/3692-1/ Third Party Advisory
https://usn.ubuntu.com/3692-2/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4231 Issue Tracking Third Party Advisory
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Information Leak / Disclosure (CWE-200)

Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-0495
NVD Published Date:
06/13/2018
NVD Last Modified:
10/31/2018