CVE-2023-27989 Memory corruption in NR7101 firmware
A remote authenticated attacker can cause denial of service on Zyxel NR7101 devices via a buffer overflow in the CGI program.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-27989?
CVE-2023-27989 is a medium-severity memory corruption vulnerability in Zyxel NR7101 firmware, published on 5 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
Weakness: CWE-120
Which versions are affected by CVE-2023-27989?
It affects 4 products.
Products include Zyxel Lte7480-M804 Firmware, Zyxel Lte7490-M904 Firmware, Zyxel Nebula Nr7101 Firmware, Zyxel Nr7101 Firmware.
How do I fix CVE-2023-27989?
No fix has been published for CVE-2023-27989 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-27989 being exploited?
There is no known exploitation of CVE-2023-27989 in the wild and no public exploit code.
Sources
Also known as GHSA-x86w-xv82-wrpx.