CVE-2020-25578 Information disclosure in FreeBSD
Local attackers can read uninitialized kernel stack bytes via specific file systems, potentially leaking sensitive information.
- 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-2020-25578?
CVE-2020-25578 is a medium-severity vulnerability in Freebsd Freebsd, published on 26 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In FreeBSD 12.2-STABLE before r368969, 11.4-STABLE before r369047, 12.2-RELEASE before p3, 12.1-RELEASE before p13 and 11.4-RELEASE before p7 several file systems were not properly initializing the d_off field of the dirent structures returned by VOP_READDIR. In particular, tmpfs(5), smbfs(5), autofs(5) and mqueuefs(5) were failing to do so. As a result, eight uninitialized kernel stack bytes may be leaked to userspace by these file systems.
Weakness: CWE-665
Which versions are affected by CVE-2020-25578?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2020-25578?
No fix has been published for CVE-2020-25578 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-25578 being exploited?
There is no known exploitation of CVE-2020-25578 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-v45v-x46m-37q7.