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Red Hat 9 RHSA-2023:1141 Moderate: Timing Side-Channel in GnuTLS

red hat
Calendar Grey March 8, 2023
Dist Redhat Esm H88
RedHat issued a crucial advisory about a gnutls update that resolves a moderate security flaw and includes essential bug fixes for better stability and performance.
An update for gnutls is now available for Red Hat Enterprise Linux 9

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: timing side-channel in the TLS RSA key exchange code (CVE-2023-0361)
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.
Bug Fix(es):
* CCM tag length should be limited to known values (BZ#2144535)
* In FIPS mode, gnutls should reject RSASSA-PSS salt lengths larger than the output size of the hash function used, or provide an indicator (BZ#2144537)
* dracut-cmdline[554]: Error in GnuTLS initialization: Error while performing self checks i FIPS mode (BZ#2149640)

Topics%20covered

Topics Covered

security advisory moderate Red Hat encryption moderate severity gnutls TLS issue timing issue timing side-channel

References

https://access.redhat.com/security/cve/CVE-2023-0361 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux AppStream (v. 9):
aarch64: gnutls-c++-3.7.6-18.el9_1.aarch64.rpm gnutls-c++-debuginfo-3.7.6-18.el9_1.aarch64.rpm gnutls-dane-3.7.6-18.el9_1.aarch64.rpm gnutls-dane-debuginfo-3.7.6-18.el9_1.aarch64.rpm gnutls-debuginfo-3.7.6-18.el9_1.aarch64.rpm gnutls-debugsource-3.7.6-18.el9_1.aarch64.rpm gnutls-devel-3.7.6-18.el9_1.aarch64.rpm gnutls-utils-3.7.6-18.el9_1.aarch64.rpm gnutls-utils-debuginfo-3.7.6-18.el9_1.aarch64.rpm
ppc64le: gnutls-c++-3.7.6-18.el9_1.ppc64le.rpm gnutls-c++-debuginfo-3.7.6-18.el9_1.ppc64le.rpm gnutls-dane-3.7.6-18.el9_1.ppc64le.rpm gnutls-dane-debuginfo-3.7.6-18.el9_1.ppc64le.rpm gnutls-debuginfo-3.7.6-18.el9_1.ppc64le.rpm gnutls-debugsource-3.7.6-18.el9_1.ppc64le.rpm gnutls-devel-3.7.6-18.el9_1.ppc64le.rpm gnutls-utils-3.7.6-18.el9_1.ppc64le.rpm gnutls-utils-debuginfo-3.7.6-18.el9_1.ppc64le.rpm
s390x: gnutls-c++-3.7.6-18.el9_1.s390x.rpm gnutls-c++-debuginfo-3.7.6-18.el9_1.s390x.rpm gnutls-dane-3.7.6-18.el9_1.s390x.rpm gnutls-dane-debuginfo-3.7.6-18.el9_1.s390x.rpm gnutls-debuginfo-3.7.6-18.el9_1.s390x.rpm gnutls-debugsource-3.7.6-18.el9_1.s390x.rpm gnutls-devel-3.7.6-18.el9_1.s390x.rpm gnutls-utils-3.7.6-18.el9_1.s390x.rpm gnutls-utils-debuginfo-3.7.6-18.el9_1.s390x.rpm
x86_64: gnutls-c++-3.7.6-18.el9_1.i686.rpm

Read the Full Advisory


Advisory ID: RHSA-2023:1141-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:1141
Issue date: 2023-03-07

Topic

An update for gnutls is now available for Red Hat Enterprise Linux 9.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 moderate Red Hat encryption moderate severity gnutls TLS issue timing issue timing side-channel

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 9) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS (v. 9) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

2144537 - In FIPS mode, gnutls should reject RSASSA-PSS salt lengths larger than the output size of the hash function used, or provide an indicator [rhel-9.1.0.z]

2149640 - dracut-cmdline[554]: Error in GnuTLS initialization: Error while performing self checks i FIPS mode [rhel-9.1.0.z]

2162596 - CVE-2023-0361 gnutls: timing side-channel in the TLS RSA key exchange code

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