CVE-2024-45306 heap-buffer-overflow in Vim
An attacker can cause a heap-buffer-overflow and crash Vim by triggering an invalid cursor position, requiring users to upgrade to the patched version.
- 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-2024-45306?
CVE-2024-45306 is a medium-severity memory corruption vulnerability in Vim Vim, published on 2 Sep 2024. 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
Vim is an open source, command line text editor. Patch v9.1.0038 optimized how the cursor position is calculated and removed a loop, that verified that the cursor position always points inside a line and does not become invalid by pointing beyond the end of a line. Back then we assumed this loop is unnecessary. However, this change made it possible that the cursor position stays invalid and points beyond the end of a line, which would eventually cause a heap-buffer-overflow when trying to access the line pointer at the specified cursor position. It's not quite clear yet, what can lead to this situation that the cursor points to an invalid position. That's why patch v9.1.0707 does not include a test case. The only observed impact has been a program crash. This issue has been addressed in with the patch v9.1.0707. All users are advised to upgrade.
Which versions are affected by CVE-2024-45306?
It affects 1 product.
Products include Vim Vim.
How do I fix CVE-2024-45306?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-45306 being exploited?
There is no known exploitation of CVE-2024-45306 in the wild and no public exploit code.
Other vulnerabilities in Vim Vim
Sources
Also known as BELL-CVE-2024-45306, DEBIAN-CVE-2024-45306, GHSA-wxf9-c5gx-qrwr.