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Fencer Vulns
medium 5.9

CVE-2024-33600 json

nscd: Null pointer crashes after notfound response

published 2024-05-06 2 y ago modified 2026-10-15 25 d ago also EUVD-2024-31337

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

nscd: Null pointer crashes after notfound response

If the Name Service Cache Daemon's (nscd) cache fails to add a not-found netgroup response to the cache, the client request can result in a null pointer dereference. This flaw was introduced in glibc 2.15 when the cache was added to nscd.

This vulnerability is only present in the nscd binary.

Patch / fix

  • The GNU C Library glibc 2.40
  • glibc Debian 12 2.36-9+deb12u7
  • glibc Debian 14, Debian 13 2.37-19

debian advisories DEBIAN-CVE-2024-33600

  • glibc Ubuntu 20.04 LTS 2.31-0ubuntu9.16
  • glibc Ubuntu 22.04 LTS 2.35-0ubuntu3.8
  • glibc Ubuntu 24.04 LTS 2.39-0ubuntu8.2
  • glibc Ubuntu Pro 16.04 LTS 2.23-0ubuntu11.3+esm7
  • glibc Ubuntu Pro 18.04 LTS 2.27-3ubuntu1.6+esm3

ubuntu advisories UBUNTU-CVE-2024-33600

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • glibc RHEL 7 2.17-326.el7_9.3
  • nscd RHEL 7 2.17-326.el7_9.3
  • glibc-utils RHEL 7 2.17-326.el7_9.3
  • glibc-common RHEL 7 2.17-326.el7_9.3
  • glibc-debuginfo-common RHEL 7 2.17-326.el7_9.3
  • glibc RHEL 9 2.34-100.el9_4.2
  • nscd RHEL 9 2.34-100.el9_4.2
  • libnsl RHEL 9 2.34-100.el9_4.2

red hat advisories RHSA-2024:3588RHSA-2024:3464RHSA-2024:3411RHSA-2024:3423RHSA-2024:3339RHSA-2024:3309

  • glibc Linux Micro 6.0 2.38-7.1
  • glibc SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +17 more 2.31-150300.83.1
  • glibc SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 2.22-114.34.1
  • glibc SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS 2.26-150000.13.73.1

suse advisories SUSE-SU-2025:20038-1SUSE-SU-2024:1977-1SUSE-SU-2024:1895-2SUSE-SU-2024:1895-1SUSE-SU-2024:1675-1

  • glibc openSUSE Tumbleweed 2.39-7.1

opensuse advisories openSUSE-SU-2024:13991-1

  • glibc AlmaLinux 9 2.34-100.el9_4.2
  • nscd AlmaLinux 9 2.34-100.el9_4.2
  • libnsl AlmaLinux 9 2.34-100.el9_4.2
  • nss_db AlmaLinux 9 2.34-100.el9_4.2
  • nss_hesiod AlmaLinux 9 2.34-100.el9_4.2
  • glibc-utils AlmaLinux 9 2.34-100.el9_4.2
  • glibc-common AlmaLinux 9 2.34-100.el9_4.2
  • glibc-benchtests AlmaLinux 9 2.34-100.el9_4.2

almalinux advisories ALSA-2024:3339ALSA-2024:3344

  • glibc Rocky Linux 9 2.34-100.el9_4.2
  • glibc Rocky Linux 8 2.28-251.el8_10.2

rocky linux advisories RLSA-2024:3339RLSA-2024:3344

  • glibc CBL-Mariner 2.0 2.35-7
  • glibc Azure Linux 3.0 2.38-11

azure linux advisories AZL-40277AZL-40291

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-33600 updated cvss 5.3

glibc: null pointer dereferences after failed netgroup cache insertion

  • Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, glibc-common
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder EUS (v.8.6) nscd-debuginfo 2.28-189.10.el8_6
    fixed: vendor fix RHSA-2024:2799
  • Red Hat CodeReady Linux Builder EUS (v.8.8) nss_hesiod 2.28-225.el8_8.11, glibc-benchtests 2.28-225.el8_8.11
    fixed: vendor fix RHSA-2024:3312
  • Red Hat CodeReady Linux Builder EUS (v.9.0) nss_db 2.34-28.el9_0.6, nss_hesiod 2.34-28.el9_0.6, glibc-benchtests 2.34-28.el9_0.6
    fixed: vendor fix RHSA-2024:3423
  • Red Hat CodeReady Linux Builder EUS (v.9.2) nss_db 2.34-60.el9_2.14, nss_hesiod 2.34-60.el9_2.14, glibc-benchtests 2.34-60.el9_2.14
    fixed: vendor fix RHSA-2024:3411
  • Red Hat Enterprise Linux AppStream (v. 8) glibc-utils 2.28-251.el8_10.2, compat-libpthread-nonshared 2.28-251.el8_10.2
    fixed: vendor fix RHSA-2024:3344
  • Red Hat Enterprise Linux AppStream (v. 9) glibc-utils 2.34-100.el9_4.2, glibc-locale-source 2.34-100.el9_4.2
    fixed: vendor fix RHSA-2024:3339
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) glibc-utils 2.28-101.el8_2.2, glibc-debuginfo-common 2.28-101.el8_2.2, compat-libpthread-nonshared 2.28-101.el8_2.2
    fixed: vendor fix RHSA-2024:3464
show 22 more
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) glibc-utils 2.28-151.el8_4.2, glibc-debuginfo-common 2.28-151.el8_4.2, compat-libpthread-nonshared 2.28-151.el8_4.2 Red Hat Enterprise Linux AppStream E4S (v.8.4) glibc-utils 2.28-151.el8_4.2, glibc-debuginfo-common 2.28-151.el8_4.2, compat-libpthread-nonshared 2.28-151.el8_4.2
    fixed: vendor fix RHSA-2024:3309
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) nscd-debuginfo 2.28-189.10.el8_6
    fixed: vendor fix RHSA-2024:2799
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) glibc-utils 2.28-225.el8_8.11, compat-libpthread-nonshared 2.28-225.el8_8.11
    fixed: vendor fix RHSA-2024:3312
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) glibc-utils 2.34-28.el9_0.6, glibc-locale-source 2.34-28.el9_0.6
    fixed: vendor fix RHSA-2024:3423
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) glibc-utils 2.34-60.el9_2.14, glibc-locale-source 2.34-60.el9_2.14
    fixed: vendor fix RHSA-2024:3411
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) glibc-utils 2.28-151.el8_4.2, glibc-debuginfo-common 2.28-151.el8_4.2, compat-libpthread-nonshared 2.28-151.el8_4.2
    fixed: vendor fix RHSA-2024:3309
  • Red Hat Enterprise Linux BaseOS (v. 8) nscd 2.28-251.el8_10.2, glibc 2.28-251.el8_10.2, libnsl 2.28-251.el8_10.2, nss_db 2.28-251.el8_10.2, glibc-common 2.28-251.el8_10.2, glibc-gconv-extra 2.28-251.el8_10.2, +3 more
    fixed: vendor fix RHSA-2024:3344
  • Red Hat Enterprise Linux BaseOS (v. 9) nscd 2.34-100.el9_4.2, glibc 2.34-100.el9_4.2, libnsl 2.34-100.el9_4.2, glibc-common 2.34-100.el9_4.2, glibc-gconv-extra 2.34-100.el9_4.2, glibc-all-langpacks 2.34-100.el9_4.2, +1 more
    fixed: vendor fix RHSA-2024:3339
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) nscd 2.28-101.el8_2.2, glibc 2.28-101.el8_2.2, libnsl 2.28-101.el8_2.2, nss_db 2.28-101.el8_2.2, glibc-common 2.28-101.el8_2.2, glibc-all-langpacks 2.28-101.el8_2.2, +3 more
    fixed: vendor fix RHSA-2024:3464
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) nscd 2.28-151.el8_4.2, glibc 2.28-151.el8_4.2, libnsl 2.28-151.el8_4.2, nss_db 2.28-151.el8_4.2, glibc-common 2.28-151.el8_4.2, glibc-all-langpacks 2.28-151.el8_4.2, +3 more Red Hat Enterprise Linux BaseOS E4S (v.8.4) nscd 2.28-151.el8_4.2, glibc 2.28-151.el8_4.2, libnsl 2.28-151.el8_4.2, nss_db 2.28-151.el8_4.2, glibc-common 2.28-151.el8_4.2, glibc-all-langpacks 2.28-151.el8_4.2, +3 more
    fixed: vendor fix RHSA-2024:3309
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) nscd 2.28-189.10.el8_6
    fixed: vendor fix RHSA-2024:2799
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) nscd 2.28-225.el8_8.11, glibc 2.28-225.el8_8.11, libnsl 2.28-225.el8_8.11, nss_db 2.28-225.el8_8.11, glibc-common 2.28-225.el8_8.11, glibc-gconv-extra 2.28-225.el8_8.11, +3 more
    fixed: vendor fix RHSA-2024:3312
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) nscd 2.34-28.el9_0.6, glibc 2.34-28.el9_0.6, libnsl 2.34-28.el9_0.6, glibc-common 2.34-28.el9_0.6, glibc-gconv-extra 2.34-28.el9_0.6, glibc-all-langpacks 2.34-28.el9_0.6, +1 more
    fixed: vendor fix RHSA-2024:3423
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) nscd 2.34-60.el9_2.14, glibc 2.34-60.el9_2.14, libnsl 2.34-60.el9_2.14, glibc-common 2.34-60.el9_2.14, glibc-gconv-extra 2.34-60.el9_2.14, glibc-all-langpacks 2.34-60.el9_2.14, +1 more
    fixed: vendor fix RHSA-2024:3411
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4) nscd 2.28-151.el8_4.2, glibc 2.28-151.el8_4.2, libnsl 2.28-151.el8_4.2, nss_db 2.28-151.el8_4.2, glibc-common 2.28-151.el8_4.2, glibc-all-langpacks 2.28-151.el8_4.2, +3 more
    fixed: vendor fix RHSA-2024:3309
  • Red Hat Enterprise Linux Client (v. 7) nscd 2.17-326.el7_9.3, glibc 2.17-326.el7_9.3, glibc-utils 2.17-326.el7_9.3, glibc-common 2.17-326.el7_9.3, glibc-debuginfo-common 2.17-326.el7_9.3 Red Hat Enterprise Linux Client Optional (v. 7) glibc-debuginfo-common 2.17-326.el7_9.3 Red Hat Enterprise Linux ComputeNode Optional (v. 7) glibc-debuginfo-common 2.17-326.el7_9.3
    fixed: vendor fix RHSA-2024:3588
  • Red Hat Enterprise Linux CRB (v. 8) nss_hesiod 2.28-251.el8_10.2, glibc-benchtests 2.28-251.el8_10.2
    fixed: vendor fix RHSA-2024:3344
  • Red Hat Enterprise Linux CRB (v. 9) nss_db 2.34-100.el9_4.2, nss_hesiod 2.34-100.el9_4.2, glibc-benchtests 2.34-100.el9_4.2
    fixed: vendor fix RHSA-2024:3339
  • Red Hat Enterprise Linux Server (v. 7) nscd 2.17-326.el7_9.3, glibc 2.17-326.el7_9.3, glibc-utils 2.17-326.el7_9.3, glibc-common 2.17-326.el7_9.3, glibc-debuginfo-common 2.17-326.el7_9.3 Red Hat Enterprise Linux Server Optional (v. 7) glibc-debuginfo-common 2.17-326.el7_9.3 Red Hat Enterprise Linux Workstation (v. 7) nscd 2.17-326.el7_9.3, glibc 2.17-326.el7_9.3, glibc-utils 2.17-326.el7_9.3, glibc-common 2.17-326.el7_9.3, glibc-debuginfo-common 2.17-326.el7_9.3 Red Hat Enterprise Linux Workstation Optional (v. 7) glibc-debuginfo-common 2.17-326.el7_9.3
    fixed: vendor fix RHSA-2024:3588
  • Red Hat Service Interconnect 1.4 service-interconnect/skupper-router-rhel9 2.4.3-4, service-interconnect/skupper-operator-bundle 1.4.5-4, service-interconnect/skupper-config-sync-rhel9 1.4.5-2, service-interconnect/skupper-flow-collector-rhel9 1.4.5-2, service-interconnect/skupper-site-controller-rhel9 1.4.5-2, service-interconnect/skupper-service-controller-rhel9 1.4.5-2
    fixed: vendor fix RHSA-2024:4126
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 nscd-debuginfo 2.28-189.10.el8_6
    fixed: vendor fix RHSA-2024:2799
  • Red Hat CodeReady Linux Builder EUS (v.8.6) nss_hesiod 2.28-189.10.el8_6, glibc-benchtests 2.28-189.10.el8_6 Red Hat Enterprise Linux 6 compat-glibc Red Hat Enterprise Linux 7 compat-glibc Red Hat Enterprise Linux 10 glibc
    not affected: vulnerable code not present

3 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-25-162-05 updated cvss 5.3

Siemens SIMATIC S7-1500 CPU family

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.5
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • The GNU C Library glibc
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.