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Vulnerability · Published Aug 8, 2024 · Assigned by redhat

CVE-2024-43167Unbound: null pointer dereference in unbound

Low 2.8

In plain English

A low-severity null pointer dereference in Red Hat Enterprise Linux 6 from Red Hat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)2.8Low
Exploit odds (30 days)0.4%top 66.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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 NULL pointer dereference flaw was found in the ub_ctx_set_fwd function in Unbound. This issue could allow an attacker who can invoke specific sequences of API calls to cause a segmentation fault. When certain API functions such as ub_ctx_set_fwd and ub_ctx_resolvconf are called in a particular order, the program attempts to read from a NULL pointer, leading to a crash. This issue can result in a denial of service by causing the application to terminate unexpectedly.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12unbound1.17.1-2+deb12u3DEBIAN-CVE-2024-43167
Debian:13unbound1.21.1-1DEBIAN-CVE-2024-43167
Debian:14unbound1.21.1-1DEBIAN-CVE-2024-43167
Ubuntu:22.04:LTSunbound1.13.1-1ubuntu5.7USN-6998-1
Ubuntu:22.04:LTSunbound1.13.1-1ubuntu5.7UBUNTU-CVE-2024-43167
Ubuntu:24.04:LTSunbound1.19.2-1ubuntu3.2USN-6998-1
Ubuntu:24.04:LTSunbound1.19.2-1ubuntu3.2UBUNTU-CVE-2024-43167

Affected products (as reported)

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

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

References