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Red Hat Enterprise Linux 8: Important GnuTLS Security Fix for MITM Risk

red hat
Calendar Grey June 22, 2020
Dist Redhat Esm H88
Crucial GnuTLS patch released for Red Hat Enterprise Linux 8. Mitigations offered to combat possible man-in-the-middle vulnerabilities.
An update for gnutls is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.
Security Fix(es):
* gnutls: session resumption works without master key allowing MITM (CVE-2020-13777)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Topics%20covered

Topics Covered

security advisory update red hat important gnutls man in the middle

References

https://access.redhat.com/security/cve/CVE-2020-13777 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream E4S (v. 8.0):
aarch64: gnutls-c++-3.6.5-3.el8_0.aarch64.rpm gnutls-c++-debuginfo-3.6.5-3.el8_0.aarch64.rpm gnutls-dane-3.6.5-3.el8_0.aarch64.rpm gnutls-dane-debuginfo-3.6.5-3.el8_0.aarch64.rpm gnutls-debuginfo-3.6.5-3.el8_0.aarch64.rpm gnutls-debugsource-3.6.5-3.el8_0.aarch64.rpm gnutls-devel-3.6.5-3.el8_0.aarch64.rpm gnutls-utils-3.6.5-3.el8_0.aarch64.rpm gnutls-utils-debuginfo-3.6.5-3.el8_0.aarch64.rpm
ppc64le: gnutls-c++-3.6.5-3.el8_0.ppc64le.rpm gnutls-c++-debuginfo-3.6.5-3.el8_0.ppc64le.rpm gnutls-dane-3.6.5-3.el8_0.ppc64le.rpm gnutls-dane-debuginfo-3.6.5-3.el8_0.ppc64le.rpm gnutls-debuginfo-3.6.5-3.el8_0.ppc64le.rpm gnutls-debugsource-3.6.5-3.el8_0.ppc64le.rpm gnutls-devel-3.6.5-3.el8_0.ppc64le.rpm gnutls-utils-3.6.5-3.el8_0.ppc64le.rpm gnutls-utils-debuginfo-3.6.5-3.el8_0.ppc64le.rpm
s390x: gnutls-c++-3.6.5-3.el8_0.s390x.rpm gnutls-c++-debuginfo-3.6.5-3.el8_0.s390x.rpm gnutls-dane-3.6.5-3.el8_0.s390x.rpm gnutls-dane-debuginfo-3.6.5-3.el8_0.s390x.rpm gnutls-debuginfo-3.6.5-3.el8_0.s390x.rpm gnutls-debugsource-3.6.5-3.el8_0.s390x.rpm gnutls-devel-3.6.5-3.el8_0.s390x.rpm gnutls-utils-3.6.5-3.el8_0.s390x.rpm gnutls-utils-debuginfo-3.6.5-3.el8_0.s390x.rpm
x86_64: gnutls-c++-3.6.5-3.el8_0.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:2639-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2639
Issue date: 2020-06-22

Topic

An update for gnutls is now available for Red Hat Enterprise Linux 8.0Update Services for SAP Solutions.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update red hat important gnutls man in the middle

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1843723 - CVE-2020-13777 gnutls: session resumption works without master key allowing MITM

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