CVE-2018-18020 Denial of service in n/a
Remote attackers can cause a denial of service in QPDF via a crafted PDF file due to excessive recursion in the writer.
- 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-2018-18020?
CVE-2018-18020 is a low-severity denial of service vulnerability in n/a, published on 6 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
In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted PDF file.
Weakness: CWE-674
Which versions are affected by CVE-2018-18020?
It affects 1 product.
Products include Qpdf Project Qpdf.
How do I fix CVE-2018-18020?
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-2018-18020 being exploited?
There is no known exploitation of CVE-2018-18020 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2018-18020, GHSA-r676-q927-78rr, UBUNTU-CVE-2018-18020.