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Red Hat EUS 9.0: RHSA-2023-5454 Critical: glibc Buffer Overflow Fix

red hat
Calendar Grey October 5, 2023
Dist Redhat Esm H88
An important security patch for OpenSSL in Ubuntu Server 22.04 addresses a vulnerability to prevent unauthorized access.
An update for glibc is now available for Red Hat Enterprise Linux 9.0 Extended Update Support

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Summary

The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.
Security Fix(es):
* glibc: buffer overflow in ld.so leading to privilege escalation (CVE-2023-4911)
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 issue buffer overflow privilege escalation Red Hat Enterprise Linux important fix glibc update

References

https://access.redhat.com/security/cve/CVE-2023-4911 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux AppStream EUS (v.9.0):
aarch64: glibc-benchtests-debuginfo-2.34-28.el9_0.4.aarch64.rpm glibc-common-debuginfo-2.34-28.el9_0.4.aarch64.rpm glibc-debuginfo-2.34-28.el9_0.4.aarch64.rpm glibc-debugsource-2.34-28.el9_0.4.aarch64.rpm glibc-devel-2.34-28.el9_0.4.aarch64.rpm glibc-gconv-extra-debuginfo-2.34-28.el9_0.4.aarch64.rpm glibc-locale-source-2.34-28.el9_0.4.aarch64.rpm glibc-utils-2.34-28.el9_0.4.aarch64.rpm glibc-utils-debuginfo-2.34-28.el9_0.4.aarch64.rpm libnsl-debuginfo-2.34-28.el9_0.4.aarch64.rpm nscd-debuginfo-2.34-28.el9_0.4.aarch64.rpm nss_db-debuginfo-2.34-28.el9_0.4.aarch64.rpm nss_hesiod-debuginfo-2.34-28.el9_0.4.aarch64.rpm
noarch: glibc-doc-2.34-28.el9_0.4.noarch.rpm
ppc64le: glibc-benchtests-debuginfo-2.34-28.el9_0.4.ppc64le.rpm glibc-common-debuginfo-2.34-28.el9_0.4.ppc64le.rpm glibc-debuginfo-2.34-28.el9_0.4.ppc64le.rpm glibc-debugsource-2.34-28.el9_0.4.ppc64le.rpm glibc-devel-2.34-28.el9_0.4.ppc64le.rpm glibc-gconv-extra-debuginfo-2.34-28.el9_0.4.ppc64le.rpm glibc-locale-source-2.34-28.el9_0.4.ppc64le.rpm glibc-utils-2.34-28.el9_0.4.ppc64le.rpm glibc-utils-debuginfo-2.34-28.el9_0.4.ppc64le.rpm libnsl-debuginfo-2.34-28.el9_0.4.ppc64le.rpm nscd-debuginfo-2.34-28.el9_0.4.ppc64le.rpm nss_db-debuginfo-2.34-28.el9_0.4.ppc64le.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:5454-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:5454
Issue date: 2023-10-05

Topic

An update for glibc is now available for Red Hat Enterprise Linux 9.0Extended Update Support.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 issue buffer overflow privilege escalation Red Hat Enterprise Linux important fix glibc update

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v.9.0) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux AppStream EUS (v.9.0) - aarch64, noarch, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS EUS (v.9.0) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

2238352 - CVE-2023-4911 glibc: buffer overflow in ld.so leading to privilege escalation

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