<p>Upgrade <code>Ubuntu:18.04</code> <code>openssl1.0</code> to version 1.0.2n-1ubuntu5.4 or higher.</p>

Information Exposure Affecting openssl1.0 package, versions <1.0.2n-1ubuntu5.4

Threat Intelligence

0.37% (73^rd percentile)

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Snyk ID SNYK-UBUNTU1804-OPENSSL10-674776
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:18.04 openssl1.0 to version 1.0.2n-1ubuntu5.4 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.

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).

References

CVSS Scores

version 3.1

Attack Vector (AV)

Network
Attack Complexity (AC)

High
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

Low
Integrity (I)

None
Availability (A)

None