CVE-2019-1547 Affecting openssl-libs package, versions <1:1.1.1c-15.el8


0.0
medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High

    Threat Intelligence

    EPSS 0.05% (19th percentile)
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NVD
4.7 medium
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SUSE
5.5 medium
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Red Hat
5.5 medium

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  • Snyk ID SNYK-ORACLE8-OPENSSLLIBS-2558366
  • published 10 Apr 2022
  • disclosed 10 Sep 2019

How to fix?

Upgrade Oracle:8 openssl-libs to version 1:1.1.1c-15.el8 or higher.
This issue was patched in ELSA-2020-1840.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl-libs package and not the openssl-libs package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

References