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Red Hat 7.7: RHSA-2021-2998-01 Moderate: glibc Buffer Overflow

red hat
Calendar Grey August 3, 2021
Dist Redhat Esm H88
Significant glibc security enhancement for Red Hat Enterprise Linux 7.7 addressing critical vulnerabilities related to stack overflow and buffer management.
An update for glibc is now available for Red Hat Enterprise Linux 7.7 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: stack corruption from crafted input in cosl, sinl, sincosl, and tanl functions (CVE-2020-10029)
* 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 update buffer overflow Red Hat Enterprise Linux moderate severity stack corruption glibc fix

References

https://access.redhat.com/security/cve/CVE-2020-10029 https://access.redhat.com/security/cve/CVE-2020-29573 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.7):
Source: glibc-2.17-292.el7_7.2.src.rpm
x86_64: glibc-2.17-292.el7_7.2.i686.rpm glibc-2.17-292.el7_7.2.x86_64.rpm glibc-common-2.17-292.el7_7.2.x86_64.rpm glibc-debuginfo-2.17-292.el7_7.2.i686.rpm glibc-debuginfo-2.17-292.el7_7.2.x86_64.rpm glibc-debuginfo-common-2.17-292.el7_7.2.i686.rpm glibc-debuginfo-common-2.17-292.el7_7.2.x86_64.rpm glibc-devel-2.17-292.el7_7.2.i686.rpm glibc-devel-2.17-292.el7_7.2.x86_64.rpm glibc-headers-2.17-292.el7_7.2.x86_64.rpm glibc-utils-2.17-292.el7_7.2.x86_64.rpm nscd-2.17-292.el7_7.2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7):
x86_64: glibc-debuginfo-2.17-292.el7_7.2.i686.rpm glibc-debuginfo-2.17-292.el7_7.2.x86_64.rpm glibc-debuginfo-common-2.17-292.el7_7.2.i686.rpm glibc-debuginfo-common-2.17-292.el7_7.2.x86_64.rpm glibc-static-2.17-292.el7_7.2.i686.rpm glibc-static-2.17-292.el7_7.2.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.7):
Source: glibc-2.17-292.el7_7.2.src.rpm
ppc64: glibc-2.17-292.el7_7.2.ppc.rpm glibc-2.17-292.el7_7.2.ppc64.rpm glibc-common-2.17-292.el7_7.2.ppc64.rpm glibc-debuginfo-2.17-292.el7_7.2.ppc.rpm glibc-debuginfo-2.17-292.el7_7.2.ppc64.rpm glibc-debuginfo-common-2.17-292.el7_7.2.ppc.rpm glibc-debuginfo-common-2.17-292.el7_7.2.ppc64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2998-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2998
Issue date: 2021-08-03

Topic

An update for glibc is now available for Red Hat Enterprise Linux 7.7Extended Update Support.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 update buffer overflow Red Hat Enterprise Linux moderate severity stack corruption glibc fix

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.7) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1810670 - CVE-2020-10029 glibc: stack corruption from crafted input in cosl, sinl, sincosl, and tanl functions

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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