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Red Hat Enterprise Linux 7 RHSA-2020:3861 Low: glibc Security Update

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
A new glibc release is now accessible for Red Hat Enterprise Linux 7, categorized with minimal security implications. Discover further details.
An update for glibc is now available for Red Hat Enterprise Linux 7

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: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid binaries (CVE-2019-19126)
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 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat glibc low severity

References

https://access.redhat.com/security/cve/CVE-2019-19126 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: glibc-2.17-317.el7.src.rpm
x86_64: glibc-2.17-317.el7.i686.rpm glibc-2.17-317.el7.x86_64.rpm glibc-common-2.17-317.el7.x86_64.rpm glibc-debuginfo-2.17-317.el7.i686.rpm glibc-debuginfo-2.17-317.el7.x86_64.rpm glibc-debuginfo-common-2.17-317.el7.i686.rpm glibc-debuginfo-common-2.17-317.el7.x86_64.rpm glibc-devel-2.17-317.el7.i686.rpm glibc-devel-2.17-317.el7.x86_64.rpm glibc-headers-2.17-317.el7.x86_64.rpm glibc-utils-2.17-317.el7.x86_64.rpm nscd-2.17-317.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: glibc-debuginfo-2.17-317.el7.i686.rpm glibc-debuginfo-2.17-317.el7.x86_64.rpm glibc-debuginfo-common-2.17-317.el7.i686.rpm glibc-debuginfo-common-2.17-317.el7.x86_64.rpm glibc-static-2.17-317.el7.i686.rpm glibc-static-2.17-317.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: glibc-2.17-317.el7.src.rpm
x86_64: glibc-2.17-317.el7.i686.rpm glibc-2.17-317.el7.x86_64.rpm glibc-common-2.17-317.el7.x86_64.rpm glibc-debuginfo-2.17-317.el7.i686.rpm glibc-debuginfo-2.17-317.el7.x86_64.rpm glibc-debuginfo-common-2.17-317.el7.i686.rpm glibc-debuginfo-common-2.17-317.el7.x86_64.rpm glibc-devel-2.17-317.el7.i686.rpm glibc-devel-2.17-317.el7.x86_64.rpm glibc-headers-2.17-317.el7.x86_64.rpm

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3861-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3861
Issue date: 2020-09-29

Topic

An update for glibc is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Low. 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 Red Hat glibc low severity

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1763325 - argp.h kills __attribute__, causing gcc 4.8.5 with -std=c++ results in compile / link errors for __gthrw_pthread_mutex_* functions

1772307 - glibc: Measured performance loss in lmbench for bcopy on Haswell processor

1774681 - CVE-2019-19126 glibc: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid binaries

1775816 - glibc: Disable libio vtable validation for interposed pre-2.1 stdio handles [rhel-7]

1795573 - glibc: Remove problematic Obsoletes: from the spec file

1834816 - glibc: internal_end*ent in nss_compat may clobber errno, hiding ERANGE

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