CVE-2020-7458 Memory corruption in FreeBSD
A heap buffer overflow in posix_spawnp allows arbitrary code execution via a crafted PATH environment variable in FreeBSD.
- 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-2020-7458?
CVE-2020-7458 is a critical memory corruption vulnerability in Freebsd Freebsd, published on 9 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In FreeBSD 12.1-STABLE before r362281, 11.4-STABLE before r362281, and 11.4-RELEASE before p1, long values in the user-controlled PATH environment variable cause posix_spawnp to write beyond the end of the heap allocated stack possibly leading to arbitrary code execution.
Weakness: CWE-787
Which versions are affected by CVE-2020-7458?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2020-7458?
No fix has been published for CVE-2020-7458 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-2020-7458 being exploited?
There is no known exploitation of CVE-2020-7458 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-pvv4-m6qj-jw53.