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Red Hat 8.6 RHSA-2023-5476-01 Critical: glibc Buffer Overflow

red hat
Calendar Grey October 5, 2023
Dist Redhat Esm H88
Critical security notice issued by Red Hat regarding glibc patch addressing a buffer overflow vulnerability. Find out more.
An update for glibc is now available for Red Hat Enterprise Linux 8.6 Extended Update Support

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

For the update to take effect, all services linked to the glibc library must be restarted, or the system rebooted.

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 buffer overflow privilege escalation Red Hat Enterprise Linux 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.8.6):
aarch64: compat-libpthread-nonshared-2.28-189.6.el8_6.aarch64.rpm glibc-benchtests-debuginfo-2.28-189.6.el8_6.aarch64.rpm glibc-common-debuginfo-2.28-189.6.el8_6.aarch64.rpm glibc-debuginfo-2.28-189.6.el8_6.aarch64.rpm glibc-debugsource-2.28-189.6.el8_6.aarch64.rpm glibc-gconv-extra-debuginfo-2.28-189.6.el8_6.aarch64.rpm glibc-utils-2.28-189.6.el8_6.aarch64.rpm glibc-utils-debuginfo-2.28-189.6.el8_6.aarch64.rpm libnsl-debuginfo-2.28-189.6.el8_6.aarch64.rpm nscd-debuginfo-2.28-189.6.el8_6.aarch64.rpm nss_db-debuginfo-2.28-189.6.el8_6.aarch64.rpm nss_hesiod-debuginfo-2.28-189.6.el8_6.aarch64.rpm
ppc64le: compat-libpthread-nonshared-2.28-189.6.el8_6.ppc64le.rpm glibc-benchtests-debuginfo-2.28-189.6.el8_6.ppc64le.rpm glibc-common-debuginfo-2.28-189.6.el8_6.ppc64le.rpm glibc-debuginfo-2.28-189.6.el8_6.ppc64le.rpm glibc-debugsource-2.28-189.6.el8_6.ppc64le.rpm glibc-gconv-extra-debuginfo-2.28-189.6.el8_6.ppc64le.rpm glibc-utils-2.28-189.6.el8_6.ppc64le.rpm glibc-utils-debuginfo-2.28-189.6.el8_6.ppc64le.rpm libnsl-debuginfo-2.28-189.6.el8_6.ppc64le.rpm nscd-debuginfo-2.28-189.6.el8_6.ppc64le.rpm nss_db-debuginfo-2.28-189.6.el8_6.ppc64le.rpm nss_hesiod-debuginfo-2.28-189.6.el8_6.ppc64le.rpm
s390x:

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:5476-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:5476
Issue date: 2023-10-05

Topic

An update for glibc is now available for Red Hat Enterprise Linux 8.6Extended 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 buffer overflow privilege escalation Red Hat Enterprise Linux glibc update

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v.8.6) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux AppStream EUS (v.8.6) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS EUS (v.8.6) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

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

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