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Red Hat: RHSA-2021-2813-01 Moderate: glibc Buffer Overflow Fix

red hat
Calendar Grey July 20, 2021
Dist Redhat Esm H88
A security advisory for glibc has been issued for Red Hat Enterprise Linux 7.4 to address critical buffer overflow vulnerabilities. Admins must apply updates to mitigate security risks
An update for glibc is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Li...

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: stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern (CVE-2020-29573)
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 update buffer overflow Red Hat Enterprise Linux glibc Moderate

References

https://access.redhat.com/security/cve/CVE-2020-29573 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Server AUS (v. 7.4):
Source: glibc-2.17-196.el7_4.4.src.rpm
x86_64: glibc-2.17-196.el7_4.4.i686.rpm glibc-2.17-196.el7_4.4.x86_64.rpm glibc-common-2.17-196.el7_4.4.x86_64.rpm glibc-debuginfo-2.17-196.el7_4.4.i686.rpm glibc-debuginfo-2.17-196.el7_4.4.x86_64.rpm glibc-debuginfo-common-2.17-196.el7_4.4.i686.rpm glibc-debuginfo-common-2.17-196.el7_4.4.x86_64.rpm glibc-devel-2.17-196.el7_4.4.i686.rpm glibc-devel-2.17-196.el7_4.4.x86_64.rpm glibc-headers-2.17-196.el7_4.4.x86_64.rpm glibc-utils-2.17-196.el7_4.4.x86_64.rpm nscd-2.17-196.el7_4.4.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source: glibc-2.17-196.el7_4.4.src.rpm
ppc64le: glibc-2.17-196.el7_4.4.ppc64le.rpm glibc-common-2.17-196.el7_4.4.ppc64le.rpm glibc-debuginfo-2.17-196.el7_4.4.ppc64le.rpm glibc-debuginfo-common-2.17-196.el7_4.4.ppc64le.rpm glibc-devel-2.17-196.el7_4.4.ppc64le.rpm glibc-headers-2.17-196.el7_4.4.ppc64le.rpm glibc-utils-2.17-196.el7_4.4.ppc64le.rpm nscd-2.17-196.el7_4.4.ppc64le.rpm
x86_64: glibc-2.17-196.el7_4.4.i686.rpm glibc-2.17-196.el7_4.4.x86_64.rpm glibc-common-2.17-196.el7_4.4.x86_64.rpm glibc-debuginfo-2.17-196.el7_4.4.i686.rpm glibc-debuginfo-2.17-196.el7_4.4.x86_64.rpm glibc-debuginfo-common-2.17-196.el7_4.4.i686.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:2813-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2813
Issue date: 2021-07-20

Topic

An update for glibc is now available for Red Hat Enterprise Linux 7.4Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.4 Update Services for SAPSolutions.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 security issue update buffer overflow Red Hat Enterprise Linux glibc Moderate

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server E4S (v. 7.4) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.4) - x86_64

Bugs Fixed

1905213 - CVE-2020-29573 glibc: stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern

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