CVE-2018-18688 Security feature bypass in n/a
Attackers can bypass PDF signature validation by using incremental saving to add malicious content, affecting multiple PDF reader applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-18688?
CVE-2018-18688 is a medium-severity vulnerability in Foxitsoftware Foxit Reader, published on 7 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Portable Document Format (PDF) specification does not provide any information regarding the concrete procedure of how to validate signatures. Consequently, an Incremental Saving vulnerability exists in multiple products. When an attacker uses the Incremental Saving feature to add pages or annotations, Body Updates are displayed to the user without any action by the signature-validation logic. This affects Foxit Reader before 9.4 and PhantomPDF before 8.3.9 and 9.x before 9.4. It also affects LibreOffice, Master PDF Editor, Nitro Pro, Nitro Reader, Nuance Power PDF Standard, PDF Editor 6 Pro, PDFelement6 Pro, PDF Studio Viewer 2018, PDF Studio Pro, Perfect PDF 10 Premium, and Perfect PDF Reader.
Weakness: CWE-347
Which versions are affected by CVE-2018-18688?
It affects 13 products.
Products include Code-Industry Master Pdf Editor, Foxitsoftware Foxit Reader, Foxitsoftware Phantompdf, Gonitro Nitro Pro, Gonitro Nitro Reader, Iskysoft Pdf Editor 6 and 7 more.
How do I fix CVE-2018-18688?
No fix has been published for CVE-2018-18688 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-18688 being exploited?
There is no known exploitation of CVE-2018-18688 in the wild and no public exploit code.
Sources
Also known as GHSA-q966-hp9v-pw89.