CVE-2021-45951 Memory corruption in n/a
A heap-based buffer overflow in Dnsmasq could allow attackers to cause denial of service or execute arbitrary code, though the vendor disputes its severity.
- 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-2021-45951?
CVE-2021-45951 is a critical memory corruption vulnerability in n/a, published on 31 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Dnsmasq 2.86 has a heap-based buffer overflow in check_bad_address (called from check_for_bogus_wildcard and FuzzCheckForBogusWildcard). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge.
Weakness: CWE-787
Which versions are affected by CVE-2021-45951?
It affects 1 product.
Products include Thekelleys Dnsmasq.
How do I fix CVE-2021-45951?
No fix has been published for CVE-2021-45951 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-2021-45951 being exploited?
There is no known exploitation of CVE-2021-45951 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-vwm2-rj6m-p924.