CVE-2024-43167

Publication date 12 August 2024

Last updated 30 May 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

2.8 · Low

Score breakdown

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.

Status

Package Ubuntu Release Status
unbound 24.04 LTS noble
Fixed 1.19.2-1ubuntu3.2
22.04 LTS jammy
Fixed 1.13.1-1ubuntu5.7
20.04 LTS focal
Fixed 1.9.4-2ubuntu1.8
18.04 LTS bionic
Fixed 1.6.7-1ubuntu2.6+esm2
16.04 LTS xenial
Fixed 1.5.8-1ubuntu1.1+esm1
14.04 LTS trusty
Fixed 1.4.22-1ubuntu4.14.04.3+esm1

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Severity score breakdown

Parameter Value
Base score 2.8 · Low
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-6998-1
    • Unbound vulnerabilities
    • 11 September 2024

Other references