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Linux Distros Unpatched Vulnerability : CVE-2018-0495

medium Nessus Plugin ID 221554

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - 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. (CVE-2018-0495)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2018-0495

Plugin Details

Severity: Medium

ID: 221554

File Name: unpatched_CVE_2018_0495.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 3/4/2025

Updated: 8/18/2025

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.5

Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2018-0495

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.2

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:openssl, p-cpe:/a:redhat:enterprise_linux:openssl-devel, p-cpe:/a:centos:centos:ovmf, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:centos:centos:openssl098e, p-cpe:/a:redhat:enterprise_linux:openssl-perl, p-cpe:/a:centos:centos:nss, p-cpe:/a:centos:centos:openssl-perl, p-cpe:/a:redhat:enterprise_linux:nss-tools, p-cpe:/a:redhat:enterprise_linux:openssl-static, p-cpe:/a:centos:centos:openssl-static, p-cpe:/a:centos:centos:nss-devel, p-cpe:/a:redhat:enterprise_linux:openssl097a, p-cpe:/a:centos:centos:openssl097a, p-cpe:/a:centos:centos:nss-tools, cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:nss-pkcs11-devel, p-cpe:/a:centos:centos:openssl-devel, p-cpe:/a:centos:centos:nss-pkcs11-devel, p-cpe:/a:centos:centos:nss-sysinit, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:nss-devel, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:nss-sysinit, p-cpe:/a:redhat:enterprise_linux:openssl, p-cpe:/a:redhat:enterprise_linux:ovmf, p-cpe:/a:redhat:enterprise_linux:openssl098e, p-cpe:/a:redhat:enterprise_linux:nss

Required KB Items: Host/OS/identifier, Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 6/13/2018

Reference Information

CVE: CVE-2018-0495