RHSA-2024:3339HighCVSS 8.8

Red Hat Security Advisory: glibc security update

Published
May 23, 2024
Last Modified
October 15, 2026

🔗 CVE IDs covered (5)

CVE-2024-2961 →CVE-2024-33599 →CVE-2024-33600 →CVE-2024-33601 →CVE-2024-33602 →

📋 Description

CVE-2024-2961 — glibc: Out of bounds write in iconv may lead to remote code execution CVE-2024-33599 — glibc: stack-based buffer overflow in netgroup cache CVE-2024-33600 — glibc: null pointer dereferences after failed netgroup cache insertion CVE-2024-33601 — glibc: netgroup cache may terminate daemon on memory allocation failure CVE-2024-33602 — glibc: netgroup cache assumes NSS callback uses in-buffer strings

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • Red Hat Enterprise Linux CRB (v. 9)
  • glibc-0:2.34-100.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-100.el9_4.2.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-100.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-100.el9_4.2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-100.el9_4.2.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-100.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-100.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-100.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-100.el9_4.2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-100.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-0:2.34-100.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-0:2.34-100.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-0:2.34-100.el9_4.2.s390x as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-0:2.34-100.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.i686 as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.s390x as a component of Red Hat Enterprise Linux CRB (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-100.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +170 more not shown

✅ Remediation

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. Workaround: This issue can be mitigated by removing the ISO-2022-CN-EXT from glibc-gconv-extra's modules configuration. This can be done by: 1) Verify if the module is loaded by running: ~~~ $ iconv -l | grep -E 'CN-?EXT' ISO-2022-CN-EXT// ISO2022CNEXT// ~~~ If the grep output looks like the above, ISO-2022-CN-EXT module is enabled. 2) Disabled the module by editing the file located at /usr/lib64/gconv/gconv-modules.d/gconv-modules-extra.conf and comment the following lines. For RHEL 7 the file that needs to be edited is /usr/lib64/gconv/gconv-modules. This step requires to be executed by a privileged user: ~~~ # from to module cost alias ISO2022CNEXT// ISO-2022-CN-EXT// module ISO-2022-CN-EXT// INTERNAL ISO-2022-CN-EXT 1 module INTERNAL ISO-2022-CN-EXT// ISO-2022-CN-EXT 1 ~~~ For commenting those lines just add the '#' character at the beginning of mentioned lines: ~~~ # from to module cost #alias ISO2022CNEXT// ISO-2022-CN-EXT// #module ISO-2022-CN-EXT// INTERNAL ISO-2022-CN-EXT 1 #module INTERNAL ISO-2022-CN-EXT// ISO-2022-CN-EXT 1 ~~~ 3) Update the iconv cache by running: ~~~ sudo iconvconfig ~~~ 4) Check if the module was disabled by running the first step again. This time ISO-2022-CN-EXT should not appear in the output. Please notice that disabling the mentioned gconv module may lead applications relying in the affected module to fail in converting characters and should be used as a temporary mitigation before being able to fully update the affected package. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (8)