CVE-2018-25427 Arm Whois 3.11 Buffer Overflow via SEH Overwrite
Remote attackers can execute arbitrary code by sending oversized input to the IP or domain fields, overwriting the structured exception handler.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-25427?
CVE-2018-25427 is a critical memory corruption vulnerability in Armcode Arm Whois, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Arm Whois 3.11 contains a stack-based buffer overflow vulnerability that allows remote attackers to execute arbitrary code by supplying oversized input to the IP address or domain field. Attackers can craft malicious input exceeding 658 bytes with shellcode to overwrite the structured exception handler and gain command execution when the application processes the input.
Weakness: CWE-121
Which versions are affected by CVE-2018-25427?
How do I fix CVE-2018-25427?
No fix has been published for CVE-2018-25427 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-2018-25427 being exploited?
There is no known exploitation of CVE-2018-25427 in the wild and no public exploit code.
Sources
Also known as GHSA-phhg-j5g3-4q79.