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NVD / CVE Program· CNA glibc

CVE-2024-33600: nscd: Null pointer crashes after notfound response

Noroxi assessment

Priority: Monitor (action score 23/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 68.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: azl3 glibc 2.38-11 on Azure Linux 3.0 2.38-11; cbl2 glibc 2.35-7 on CBL Mariner 2.0 2.35-7; cbl2 glibc 2.35-7 on CBL-Mariner 2.0 2.35-7.

Low priority for now. Upgrade to azl3 glibc 2.38-11 on Azure Linux 3.0 2.38-11; cbl2 glibc 2.35-7 on CBL Mariner 2.0 2.35-7; cbl2 glibc 2.35-7 on CBL-Mariner 2.0 2.35-7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.9 · v3.1—No exploit Fix available
Published
May 6, 2024
Updated
Oct 15, 2026
EPSS
1.2% · 68th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-33600

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnuglibc
debiandebian linux
netappactive iq unified manager
netapph300s firmware
netapph300s
netapph500s firmware
netapph500s
netapph700s firmware
netapph700s
netapph410s firmware
netapph410s
netapph410c firmware

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • gnu glibc2.15 and later · before 2.40
  • netapp active iq unified managerall versions
  • netapp h300s firmwareall versions
  • netapp h410c firmwareall versions
  • netapp h410s firmwareall versions
  • netapp h500s firmwareall versions
  • netapp h610c firmwareall versions
  • netapp h610s firmwareall versions
  • netapp h615c firmwareall versions
  • netapp h700s firmwareall versions
  • netapp hci bootstrap osall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (glibc). Independent of NVD's CPE analysis and usually ahead of it.

  • The GNU C Library glibc

    • 2.15 and later · before 2.40affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8compat-libpthread-nonsharedbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibcbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-all-langpacksbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-benchtestsbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-commonbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-develbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-docbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-gconv-extrabefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-headersbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-aabefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-afbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-agrbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-akbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-ambefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-anbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-anpbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-arbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-asbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-astbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-aycbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-azbefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-bebefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-bembefore 2.28-251.el8_10.22.28-251.el8_10.2
AlmaLinux:8glibc-langpack-berbefore 2.28-251.el8_10.22.28-251.el8_10.2

+96

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-4911Glibc: buffer overflow in ld.so leading to privilege escalationKEV
    80Now
  • CVE-2015-0235Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows context-depen
    68This week
  • CVE-2015-7547Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc
    59Plan

Published before and after this one in the same product

  • ← EarlierCVE-2024-2961Apr 17, 2024 · The iconv() function in the GNU C Library versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converti
    55Plan
  • ← EarlierCVE-2024-33599May 6, 2024 · nscd: Stack-based buffer overflow in netgroup cache
    32Monitor
  • Later →CVE-2024-33601May 6, 2024 · nscd: netgroup cache may terminate daemon on memory allocation failure
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 glibc 2.38-11 on Azure Linux 3.02.38-11 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-7 on CBL Mariner 2.02.35-7 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-7 on CBL-Mariner 2.02.35-7 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:glibc2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-all-langpacks2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-benchtests2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-common2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-devel2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-doc2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-gconv-extra2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-headers2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-aa2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-af2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-agr2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-ak2.34-100.el9_4.2 · AlmaLinux:9Package registry (OSV)
debian:glibc2.36-9+deb12u7 · Debian:12Package registry (OSV)
opensuse:glibc2.31-150300.83.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
red hat:glibc-benchtests-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-common-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-debugsource0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-devel0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-gconv-extra-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-headers0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:glibc-utils-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:libnsl-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:nscd-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:nss_db-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:nss_hesiod-debuginfo0:2.28-189.10.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
rocky linux:glibc0:2.34-100.el9_4.2 · Rocky Linux:9Package registry (OSV)

+2

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records