CVE-2018-18688
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- Exploit odds
- 1.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.1% in the next 30 days (EPSS).
- Severity: 5.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.1% · EPSS, next 30 days
- Weakness
- CWE-347
- Record status
- Modified
Affected
- code-industry Master Pdf Editor 5.1.12
- code-industry Master Pdf Editor 5.1.68
- Foxitsoftware Foxit Reader 9.4
- Foxitsoftware Phantompdf < 9.4
- Foxitsoftware Phantompdf 8.3.9
- Gonitro Nitro Pro 11.0.3.173
- Gonitro Nitro Reader 5.5.9.2
- Iskysoft Pdf Editor 6 6.4.2.3521
Attack profile CVSS 3.1 · 5.3
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-18688.md and follow it. Check whether this project is affected by CVE-2018-18688. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.foxitsoftware.com/support/security-bulletins.php
- https://www.foxitsoftware.com/support/security-bulletins.php
References
- https://pdf-insecurity.org/signature/evaluation_2018.html
- https://pdf-insecurity.org/signature/signature.html
- https://www.foxitsoftware.com/support/security-bulletins.php
- https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/
- https://pdf-insecurity.org/signature/evaluation_2018.html
- https://pdf-insecurity.org/signature/signature.html
- https://www.foxitsoftware.com/support/security-bulletins.php
- https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/