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Information Exposure Affecting openssl package, versions <1.0.2g-1ubuntu4.17

0.0
low

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.37% (73rd percentile)
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NVD
3.7 low
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Red Hat
5.9 medium

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  • Snyk ID SNYK-UBUNTU1604-OPENSSL-610191
  • published 9 Sep 2020
  • disclosed 9 Sep 2020
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Introduced: 9 Sep 2020

CVE-2020-1968 Open this link in a new tab
CWE-203 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 openssl to version 1.0.2g-1ubuntu4.17 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 Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites. This issue affects OpenSSL 1.0.2 which is out of support and no longer receiving public updates. OpenSSL 1.1.1 is not vulnerable to this issue. Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v).