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RHEL 9: RHSA-2023-5453-01 Critical: glibc Buffer Overflow Threat

red hat
Calendar Grey October 5, 2023
Dist Redhat Esm H88
Significant glibc security patches have been released for Red Hat Enterprise Linux, targeting severe vulnerabilities and their potential consequences.
An update for glibc is now available for Red Hat Enterprise Linux 9

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)
* glibc: Stack read overflow in getaddrinfo in no-aaaa mode (CVE-2023-4527)
* glibc: potential use-after-free in getaddrinfo() (CVE-2023-4806)
* glibc: potential use-after-free in gaih_inet() (CVE-2023-4813)
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 critical security issue

References

https://access.redhat.com/security/cve/CVE-2023-4527 https://access.redhat.com/security/cve/CVE-2023-4806 https://access.redhat.com/security/cve/CVE-2023-4813 https://access.redhat.com/security/cve/CVE-2023-4911 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux AppStream (v. 9):
aarch64: glibc-benchtests-debuginfo-2.34-60.el9_2.7.aarch64.rpm glibc-common-debuginfo-2.34-60.el9_2.7.aarch64.rpm glibc-debuginfo-2.34-60.el9_2.7.aarch64.rpm glibc-debugsource-2.34-60.el9_2.7.aarch64.rpm glibc-devel-2.34-60.el9_2.7.aarch64.rpm glibc-gconv-extra-debuginfo-2.34-60.el9_2.7.aarch64.rpm glibc-locale-source-2.34-60.el9_2.7.aarch64.rpm glibc-utils-2.34-60.el9_2.7.aarch64.rpm glibc-utils-debuginfo-2.34-60.el9_2.7.aarch64.rpm libnsl-debuginfo-2.34-60.el9_2.7.aarch64.rpm nscd-debuginfo-2.34-60.el9_2.7.aarch64.rpm nss_db-debuginfo-2.34-60.el9_2.7.aarch64.rpm nss_hesiod-debuginfo-2.34-60.el9_2.7.aarch64.rpm
noarch: glibc-doc-2.34-60.el9_2.7.noarch.rpm
ppc64le: glibc-benchtests-debuginfo-2.34-60.el9_2.7.ppc64le.rpm glibc-common-debuginfo-2.34-60.el9_2.7.ppc64le.rpm glibc-debuginfo-2.34-60.el9_2.7.ppc64le.rpm glibc-debugsource-2.34-60.el9_2.7.ppc64le.rpm glibc-devel-2.34-60.el9_2.7.ppc64le.rpm glibc-gconv-extra-debuginfo-2.34-60.el9_2.7.ppc64le.rpm glibc-locale-source-2.34-60.el9_2.7.ppc64le.rpm glibc-utils-2.34-60.el9_2.7.ppc64le.rpm glibc-utils-debuginfo-2.34-60.el9_2.7.ppc64le.rpm libnsl-debuginfo-2.34-60.el9_2.7.ppc64le.rpm nscd-debuginfo-2.34-60.el9_2.7.ppc64le.rpm nss_db-debuginfo-2.34-60.el9_2.7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:5453-01
Product: Red Hat Enterprise Linux
Advisory URL:
Issue date: 2023-10-05

Topic

An update for glibc is now available for Red Hat Enterprise Linux 9.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 critical security issue

Relevant Releases Architectures

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

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

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

Bugs Fixed

2234712 - CVE-2023-4527 glibc: Stack read overflow in getaddrinfo in no-aaaa mode

2237782 - CVE-2023-4806 glibc: potential use-after-free in getaddrinfo()

2237798 - CVE-2023-4813 glibc: potential use-after-free in gaih_inet()

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

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