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Red Hat Enterprise Linux 8 RHSA-2021-4358 Moderate: glibc Bug Issues

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
Tackle moderate glibc vulnerabilities affecting Red Hat Enterprise Linux 8 by implementing crucial patches and updates.
An update for glibc 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

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: Arbitrary read in wordexp() (CVE-2021-35942)
* glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c (CVE-2021-27645)
* glibc: mq_notify does not handle separately allocated thread attributes (CVE-2021-33574)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux moderate severity security issues glibc update C library

References

https://access.redhat.com/security/cve/CVE-2021-27645 https://access.redhat.com/security/cve/CVE-2021-33574 https://access.redhat.com/security/cve/CVE-2021-35942 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
aarch64: compat-libpthread-nonshared-2.28-164.el8.aarch64.rpm glibc-debuginfo-2.28-164.el8.aarch64.rpm glibc-utils-2.28-164.el8.aarch64.rpm
ppc64le: compat-libpthread-nonshared-2.28-164.el8.ppc64le.rpm glibc-debuginfo-2.28-164.el8.ppc64le.rpm glibc-debuginfo-common-2.28-164.el8.ppc64le.rpm glibc-utils-2.28-164.el8.ppc64le.rpm
s390x: compat-libpthread-nonshared-2.28-164.el8.s390x.rpm glibc-debuginfo-2.28-164.el8.s390x.rpm glibc-debuginfo-common-2.28-164.el8.s390x.rpm glibc-utils-2.28-164.el8.s390x.rpm
x86_64: compat-libpthread-nonshared-2.28-164.el8.x86_64.rpm glibc-debuginfo-2.28-164.el8.x86_64.rpm glibc-debuginfo-common-2.28-164.el8.x86_64.rpm glibc-utils-2.28-164.el8.x86_64.rpm
Red Hat Enterprise Linux BaseOS (v. 8):
Source: glibc-2.28-164.el8.src.rpm
aarch64: glibc-2.28-164.el8.aarch64.rpm glibc-all-langpacks-2.28-164.el8.aarch64.rpm glibc-common-2.28-164.el8.aarch64.rpm glibc-debuginfo-2.28-164.el8.aarch64.rpm glibc-devel-2.28-164.el8.aarch64.rpm glibc-headers-2.28-164.el8.aarch64.rpm glibc-langpack-aa-2.28-164.el8.aarch64.rpm glibc-langpack-af-2.28-164.el8.aarch64.rpm glibc-langpack-agr-2.28-164.el8.aarch64.rpm glibc-langpack-ak-2.28-164.el8.aarch64.rpm glibc-langpack-am-2.28-164.el8.aarch64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:4358-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4358
Issue date: 2021-11-09

Topic

An update for glibc is now available for Red Hat Enterprise Linux 8.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 bug fix Red Hat Enterprise Linux moderate severity security issues glibc update C library

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

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

Bugs Fixed

1871386 - glibc: Update syscall names for Linux 5.6, 5.7, and 5.8.

1912670 - semctl SEM_STAT_ANY fails to pass the buffer specified by the caller to the kernel

1927877 - CVE-2021-27645 glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c [rhel-8]

1930302 - glibc: provide IPPROTO_MPTCP definition

1932589 - CVE-2021-27645 glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c

1935128 - glibc: Rebuild glibc after objcopy fix for bug 1928936 [rhel-8.5.0]

1965408 - CVE-2021-33574 glibc: mq_notify does not handle separately allocated thread attributes

1977975 - CVE-2021-35942 glibc: Arbitrary read in wordexp()

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