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Fencer Vulns
medium 4.8

CVE-2024-43168 json

Unbound: heap-buffer-overflow in unbound

published 2024-08-08 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-40094

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

DISPUTE NOTE: this issue does not pose a security risk as it (according to analysis by the original software developer, NLnet Labs) falls within the expected functionality and security controls of the application. Red Hat has made a claim that there is a security risk within Red Hat products. NLnet Labs has no further information about the claim, and suggests that affected Red Hat customers refer to available Red Hat documentation or support channels. ORIGINAL DESCRIPTION: A heap-buffer-overflow flaw was found in the cfg_mark_ports function within Unbound's config_file.c, which can lead to memory corruption. This issue could allow an attacker with local access to provide specially crafted input, potentially causing the application to crash or allowing arbitrary code execution. This could result in a denial of service or unauthorized actions on the system.

Patch / fix

  • unbound Debian 12 1.17.1-2+deb12u3
  • unbound Debian 14, Debian 13 1.20.0-1

debian advisories DEBIAN-CVE-2024-43168

  • unbound Ubuntu 20.04 LTS 1.9.4-2ubuntu1.8
  • unbound Ubuntu 22.04 LTS 1.13.1-1ubuntu5.7
  • unbound Ubuntu 24.04 LTS 1.19.2-1ubuntu3.2
  • unbound Ubuntu Pro 14.04 LTS 1.4.22-1ubuntu4.14.04.3+esm1
  • unbound Ubuntu Pro 16.04 LTS 1.5.8-1ubuntu1.1+esm1
  • unbound Ubuntu Pro 18.04 LTS 1.6.7-1ubuntu2.6+esm2

ubuntu advisories UBUNTU-CVE-2024-43168

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

  • unbound CBL-Mariner 2.0, Azure Linux 3.0 1.19.1-2

azure linux advisories AZL-47774AZL-47776

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-2024-43168 updated cvss 4.8

unbound: Heap-Buffer-Overflow in Unbound

  • Red Hat Enterprise Linux 6 unbound, unbound-libs, unbound-python Red Hat Enterprise Linux 7 unbound, unbound-libs, unbound-python
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 unbound, unbound-libs, python3-unbound Red Hat Enterprise Linux 9 unbound, unbound-libs, unbound-dracut, python3-unbound Red Hat Enterprise Linux 10 unbound Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenStack Platform 18.0 openstack-unbound-container, designate-operator-bundle-container, rhoso-operators/designate-rhel9-operator
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenStack Platform 16.2 openstack-unbound-container Red Hat OpenStack Platform 17.1 openstack-unbound-container
    not affected: vulnerable code not present

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 SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

Affected products

  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenStack Platform 16.2
  • Red Hat Red Hat OpenStack Platform 17.1
  • Red Hat Red Hat OpenStack Platform 18.0

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

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.