CVE-2018-18688

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory foxitsoftware.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.foxitsoftware.com/support/security-bulletins.php vendor advisory
https://pdf-insecurity.org/signature/evaluation_2018.html third party advisory
https://pdf-insecurity.org/signature/signature.html third party advisory
https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-18688?
CVE-2018-18688 has been scored as a medium severity vulnerability.
How to fix CVE-2018-18688?
To fix CVE-2018-18688, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-18688 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-18688 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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