CVE-2024-43168 Unbound: heap-buffer-overflow in unbound
A heap-buffer-overflow in Unbound's configuration parsing allows local attackers to cause crashes or execute arbitrary code via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-43168?
CVE-2024-43168 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 6, published on 8 Aug 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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 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.
Weakness: CWE-122
Which versions are affected by CVE-2024-43168?
How do I fix CVE-2024-43168?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-43168 being exploited?
There is no known exploitation of CVE-2024-43168 in the wild and no public exploit code.
Sources
Also known as AZL-47774, AZL-47776, DEBIAN-CVE-2024-43168, GHSA-3jwc-8hp9-37fw, UBUNTU-CVE-2024-43168.