CVE-2023-37644 Denial of service in n/a

Medium 5.5 Published 11 Jan 2024 Updated 3 Jun 2025

Attackers can cause a denial of service via large memory allocation in SWFTools when processing crafted documents.

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-2023-37644?

CVE-2023-37644 is a medium-severity denial of service vulnerability in Swftools Swftools, published on 11 Jan 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

SWFTools 0.9.2 772e55a allows attackers to trigger a large memory-allocation attempt via a crafted document, as demonstrated by pdf2swf. This occurs in png_read_chunk in lib/png.c.

Weakness: CWE-787

Which versions are affected by CVE-2023-37644?

It affects 1 product.

Products include Swftools Swftools.

How do I fix CVE-2023-37644?

No fix has been published for CVE-2023-37644 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-37644 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-37644 exists.

All Swftools Swftools vulnerabilities

Sources

Also known as GHSA-6gfr-4r2m-wr5p, UBUNTU-CVE-2023-37644.