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Information Exposure Affecting openssl1.0 package, versions <1.0.2n-1ubuntu5.1

Severity

 Recommended
low

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.08% (34th percentile)

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  • Snyk ID SNYK-UBUNTU1804-OPENSSL10-371904
  • published 13 Jun 2018
  • disclosed 13 Jun 2018
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Introduced: 13 Jun 2018

CVE-2018-0495 Open this link in a new tab
CWE-203 Open this link in a new tab

How to fix?

Upgrade Ubuntu:18.04 openssl1.0 to version 1.0.2n-1ubuntu5.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl1.0 package and not the openssl1.0 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

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.

References