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Critical Advisory: Red Hat Enterprise Linux 8 GnuTLS Out Of Bounds Access

red hat
Calendar Grey April 14, 2021
Dist Redhat Esm H88
A critical security patch for openssl and libgcrypt, rectifying buffer overflow vulnerabilities on CentOS Stream 9.
An update for gnutls and nettle 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 gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.
Nettle is a cryptographic library that is designed to fit easily in almost any context: In crypto toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like LSH or GNUPG, or even in kernel space.
Security Fix(es):
* nettle: Out of bounds memory access in signature verification (CVE-2021-20305)
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 security update Red Hat Enterprise Linux important gnutls out of bounds access out of bounds nettle

References

https://access.redhat.com/security/cve/CVE-2021-20305 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
aarch64: gnutls-c++-3.6.14-8.el8_3.aarch64.rpm gnutls-c++-debuginfo-3.6.14-8.el8_3.aarch64.rpm gnutls-dane-3.6.14-8.el8_3.aarch64.rpm gnutls-dane-debuginfo-3.6.14-8.el8_3.aarch64.rpm gnutls-debuginfo-3.6.14-8.el8_3.aarch64.rpm gnutls-debugsource-3.6.14-8.el8_3.aarch64.rpm gnutls-devel-3.6.14-8.el8_3.aarch64.rpm gnutls-utils-3.6.14-8.el8_3.aarch64.rpm gnutls-utils-debuginfo-3.6.14-8.el8_3.aarch64.rpm nettle-debuginfo-3.4.1-4.el8_3.aarch64.rpm nettle-debugsource-3.4.1-4.el8_3.aarch64.rpm nettle-devel-3.4.1-4.el8_3.aarch64.rpm
ppc64le: gnutls-c++-3.6.14-8.el8_3.ppc64le.rpm gnutls-c++-debuginfo-3.6.14-8.el8_3.ppc64le.rpm gnutls-dane-3.6.14-8.el8_3.ppc64le.rpm gnutls-dane-debuginfo-3.6.14-8.el8_3.ppc64le.rpm gnutls-debuginfo-3.6.14-8.el8_3.ppc64le.rpm gnutls-debugsource-3.6.14-8.el8_3.ppc64le.rpm gnutls-devel-3.6.14-8.el8_3.ppc64le.rpm gnutls-utils-3.6.14-8.el8_3.ppc64le.rpm gnutls-utils-debuginfo-3.6.14-8.el8_3.ppc64le.rpm nettle-debuginfo-3.4.1-4.el8_3.ppc64le.rpm nettle-debugsource-3.4.1-4.el8_3.ppc64le.rpm nettle-devel-3.4.1-4.el8_3.ppc64le.rpm
s390x: gnutls-c++-3.6.14-8.el8_3.s390x.rpm gnutls-c++-debuginfo-3.6.14-8.el8_3.s390x.rpm gnutls-dane-3.6.14-8.el8_3.s390x.rpm gnutls-dane-debuginfo-3.6.14-8.el8_3.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:1206-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1206
Issue date: 2021-04-14

Topic

An update for gnutls and nettle is now available for Red Hat EnterpriseLinux 8.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 security update Red Hat Enterprise Linux important gnutls out of bounds access out of bounds nettle

Relevant Releases Architectures

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

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

Bugs Fixed

1942533 - CVE-2021-20305 nettle: Out of bounds memory access in signature verification

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