CVE-2023-32726 Possible buffer overread from reading DNS responses
A buffer overread in Zabbix's DNS response handling allows attackers to cause denial of service or disclose sensitive memory contents.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-32726?
CVE-2023-32726 is a low-severity memory corruption vulnerability in Zabbix, published on 18 Dec 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.
Weakness: CWE-754
Which versions are affected by CVE-2023-32726?
It affects 1 product.
Products include Zabbix Zabbix-Agent.
How do I fix CVE-2023-32726?
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-2023-32726 being exploited?
There is no known exploitation of CVE-2023-32726 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2023-32726, GHSA-fqr7-2x83-wf2r, UBUNTU-CVE-2023-32726.