CVE-2018-18651 Denial of service in n/a
Attackers can cause a denial of service via a hang in Xpdf by providing a crafted PDF file with a large /Count field.
- 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-2018-18651?
CVE-2018-18651 is a medium-severity denial of service vulnerability in Xpdfreader Xpdf, published on 25 Oct 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 Xpdf 4.00. catalog->getNumPages() in AcroForm.cc allows attackers to launch a denial of service (hang caused by large loop) via a specific pdf file, as demonstrated by pdftohtml. This is mainly caused by a large number after the /Count field in the file.
Weakness: CWE-834
Which versions are affected by CVE-2018-18651?
It affects 1 product.
Products include Xpdfreader Xpdf.
How do I fix CVE-2018-18651?
No fix has been published for CVE-2018-18651 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-2018-18651 being exploited?
There is no known exploitation of CVE-2018-18651 in the wild and no public exploit code.
Other vulnerabilities in Xpdfreader Xpdf
Sources
Also known as GHSA-7mwm-jwjx-gh7x, UBUNTU-CVE-2018-18651.