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NULL Pointer Dereference Affecting openssl package, versions <1.1.0c-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 73.89% (99th percentile)
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NVD
7.5 high
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Red Hat
5.9 medium

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  • Snyk ID SNYK-DEBIAN9-OPENSSL-374746
  • published 4 May 2017
  • disclosed 4 May 2017
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Introduced: 4 May 2017

CVE-2016-7053 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Debian:9 openssl to version 1.1.0c-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.