CVE-2021-3508 Denial of service in PDFResurrect
An attacker can cause a denial of service via an infinite loop in PDFResurrect by providing a crafted PDF file.
- 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-2021-3508?
CVE-2021-3508 is a medium-severity denial of service vulnerability in PDFResurrect, published on 28 Apr 2021. 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
A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.
Weakness: CWE-835
Which versions are affected by CVE-2021-3508?
It affects 1 product.
Products include Pdfresurrect Project Pdfresurrect.
How do I fix CVE-2021-3508?
Upgrade to a fixed version.
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-2021-3508 being exploited?
There is no known exploitation of CVE-2021-3508 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-3508, GHSA-wx33-xp59-j4ch, UBUNTU-CVE-2021-3508.