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RHEL 8: RHSA-2021-4409-03 Moderate libgcrypt Side-Channel Fix

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
A revision for libgcrypt tackles a moderate vulnerability in CentOS Stream 8, bolstering cryptographic integrity.
An update for libgcrypt is now available for Red Hat Enterprise Linux 8

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 libgcrypt library provides general-purpose implementations of various cryptographic algorithms.
Security Fix(es):
* libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm (CVE-2021-33560)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory software update moderate impact red hat enterprise encryption fix side-channel libgcrypt

References

https://access.redhat.com/security/cve/CVE-2021-33560 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: libgcrypt-1.8.5-6.el8.src.rpm
aarch64: libgcrypt-1.8.5-6.el8.aarch64.rpm libgcrypt-debuginfo-1.8.5-6.el8.aarch64.rpm libgcrypt-debugsource-1.8.5-6.el8.aarch64.rpm libgcrypt-devel-1.8.5-6.el8.aarch64.rpm libgcrypt-devel-debuginfo-1.8.5-6.el8.aarch64.rpm
ppc64le: libgcrypt-1.8.5-6.el8.ppc64le.rpm libgcrypt-debuginfo-1.8.5-6.el8.ppc64le.rpm libgcrypt-debugsource-1.8.5-6.el8.ppc64le.rpm libgcrypt-devel-1.8.5-6.el8.ppc64le.rpm libgcrypt-devel-debuginfo-1.8.5-6.el8.ppc64le.rpm
s390x: libgcrypt-1.8.5-6.el8.s390x.rpm libgcrypt-debuginfo-1.8.5-6.el8.s390x.rpm libgcrypt-debugsource-1.8.5-6.el8.s390x.rpm libgcrypt-devel-1.8.5-6.el8.s390x.rpm libgcrypt-devel-debuginfo-1.8.5-6.el8.s390x.rpm
x86_64: libgcrypt-1.8.5-6.el8.i686.rpm libgcrypt-1.8.5-6.el8.x86_64.rpm libgcrypt-debuginfo-1.8.5-6.el8.i686.rpm libgcrypt-debuginfo-1.8.5-6.el8.x86_64.rpm libgcrypt-debugsource-1.8.5-6.el8.i686.rpm libgcrypt-debugsource-1.8.5-6.el8.x86_64.rpm libgcrypt-devel-1.8.5-6.el8.i686.rpm libgcrypt-devel-1.8.5-6.el8.x86_64.rpm libgcrypt-devel-debuginfo-1.8.5-6.el8.i686.rpm libgcrypt-devel-debuginfo-1.8.5-6.el8.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from

Read the Full Advisory


Advisory ID: RHSA-2021:4409-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4409
Issue date: 2021-11-09

Topic

An update for libgcrypt is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory software update moderate impact red hat enterprise encryption fix side-channel libgcrypt

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1970096 - CVE-2021-33560 libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm

1976137 - Enable hardware optimizations in FIPS mode

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