CVE-2018-20376 Memory corruption in n/a

Medium 5.5 Published 23 Dec 2018 Updated 5 Aug 2024

An attacker can trigger an out-of-bounds write in TinyCC by providing a crafted source file, potentially leading to code execution or crashes.

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: None listed

What is CVE-2018-20376?

CVE-2018-20376 is a medium-severity memory corruption vulnerability in n/a, published on 23 Dec 2018. 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

An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the asm_parse_directive function in tccasm.c.

Weakness: CWE-787

Which versions are affected by CVE-2018-20376?

It affects 1 product.

Products include Tinycc Tinycc.

How do I fix CVE-2018-20376?

No fix has been published for CVE-2018-20376 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-2018-20376 being exploited?

There is no known exploitation of CVE-2018-20376 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2018-20376, GHSA-x78g-cfg5-7fhx, UBUNTU-CVE-2018-20376.