CVE-2023-3436 Deadlock in Xpdf 4.04 due to PDF object stream references
An attacker can cause a deadlock in Xpdf by crafting a PDF with nested object stream references, leading to application unresponsiveness.
- 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-2023-3436?
CVE-2023-3436 is a low-severity denial of service vulnerability in Xpdfreader Xpdf, published on 27 Jun 2023. 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
Xpdf 4.04 will deadlock on a PDF object stream whose "Length" field is itself in another object stream.
Which versions are affected by CVE-2023-3436?
It affects 1 product.
Products include Xpdfreader Xpdf.
How do I fix CVE-2023-3436?
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-2023-3436 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-3436 exists.
Other vulnerabilities in Xpdfreader Xpdf
Sources
Also known as GHSA-whpq-78mq-qcj6, UBUNTU-CVE-2023-3436.