CVE-2018-18689

moderate-risk
Published 2021-01-07

The Portable Document Format (PDF) specification does not provide any information regarding the concrete procedure of how to validate signatures. Consequently, a Signature Wrapping vulnerability exists in multiple products. An attacker can use /ByteRange and xref manipulations that are not detected 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 eXpert PDF 12 Ultimate, Expert PDF Reader, Nitro Pro, Nitro Reader, PDF Architect 6, PDF Editor 6 Pro, PDF Experte 9 Ultimate, PDFelement6 Pro, PDF Studio Viewer 2018, PDF Studio Pro, PDF-XChange Editor and Viewer, Perfect PDF 10 Premium, Perfect PDF Reader, Soda PDF, and Soda PDF Desktop.

Do I need to act?

-
0.00% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Expert Pdf Ultimate
Pdf Experte Ultimate
Nitro Reader
Pdf Editor 6
Pdfelement6
Pdfelement6
Pdf Architect
Pdf Architect
Pdf Studio
Pdf Studio Viewer 2018
Pdf Studio Viewer 2018
Soda Pdf
Soda Pdf Desktop
Soda Pdf Desktop

Affected Vendors

Foxitsoftware Visagesoft Tracker-Software Gonitro Pdf-Xchange Pdfforge Iskysoft Qoppa Soft-Xpansion Avanquest Sodapdf

References (8)

Third Party Advisory https://pdf-insecurity.org/signature/evaluation_2018.html
Third Party Advisory https://pdf-insecurity.org/signature/signature.html
Vendor Advisory https://www.foxitsoftware.com/support/security-bulletins.php
Third Party Advisory https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/
Third Party Advisory https://pdf-insecurity.org/signature/evaluation_2018.html
Third Party Advisory https://pdf-insecurity.org/signature/signature.html
Vendor Advisory https://www.foxitsoftware.com/support/security-bulletins.php
Third Party Advisory https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/
43
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 22/34 · High