CVE-2009-4020 Memory corruption in n/a
Remote attackers can trigger a stack-based buffer overflow in the Linux kernel HFS subsystem via a crafted filesystem, potentially causing code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2009-4020?
CVE-2009-4020 is a high-severity memory corruption vulnerability in Linux kernel, published on 4 Dec 2009. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
Weakness: CWE-119
Which versions are affected by CVE-2009-4020?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2009-4020?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2009-4020 being exploited?
There is no known exploitation of CVE-2009-4020 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-qwp9-6w2r-7cq2.