Missing Required Cryptographic Step Affecting rhvm-appliance package, versions <2:4.3-20190722.0.el7


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
5.72% (90th percentile)

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  • Snyk IDSNYK-RHEL7-RHVMAPPLIANCE-4464091
  • published26 Jul 2021
  • disclosed26 Feb 2019

Introduced: 26 Feb 2019

CVE-2019-1559  (opens in a new tab)
CWE-325  (opens in a new tab)

How to fix?

Upgrade RHEL:7 rhvm-appliance to version 2:4.3-20190722.0.el7 or higher.
This issue was patched in RHSA-2019:2439.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rhvm-appliance package and not the rhvm-appliance package as distributed by RHEL. See How to fix? for RHEL:7 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

CVSS Base Scores

version 3.1