Homepage
About Snyk

Missing Required Cryptographic Step Affecting openssl package, versions <0:1.0.1e-58.el6_10

0.0
medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High

    Threat Intelligence

    EPSS 1.02% (84th percentile)
Expand this section
NVD
5.9 medium
Expand this section
SUSE
4 medium
Expand this section
Red Hat
5.9 medium

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-CENTOS6-OPENSSL-2156221
  • published 26 Jul 2021
  • disclosed 26 Feb 2019
Report a new vulnerability Found a mistake?

Introduced: 26 Feb 2019

CVE-2019-1559 Open this link in a new tab
CWE-325 Open this link in a new tab

How to fix?

Upgrade Centos:6 openssl to version 0:1.0.1e-58.el6_10 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 Centos. See How to fix? for Centos:6 relevant fixed versions and status.

If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable "non-stitched" ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q).

References