QID 239791

Date Published: 2021-11-10

QID 239791: Red Hat Update for glibc security (RHSA-2021:4358)

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)

Affected Products:

  • Red Hat enterprise linux for x86_64 8 x86_64
  • Red Hat enterprise linux for ibm z systems 8 s390x
  • Red Hat enterprise linux for power, little endian 8 ppc64le
  • Red Hat virtualization host 4 for rhel 8 x86_64
  • Red Hat enterprise linux for arm 64 8 aarch64
  • Red Hat codeready linux builder for x86_64 8 x86_64
  • Red Hat codeready linux builder for power, little endian 8 ppc64le
  • Red Hat codeready linux builder for arm 64 8 aarch64
  • Red Hat codeready linux builder for ibm z systems 8 s390x



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Refer to Refer to :
    Applying Package Updates to RHEL system     for details.

    Refer to Red Hat security advisory RHSA-2021:4358 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239791

    CVE-2021-27645 | CVE-2021-33574 | CVE-2021-35942 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4358 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4358
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