CVE Vulnerability

CVE-2018-18688

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
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
Configurations

Configuration 1
Information

Published : 2021-01-07 06:15

Updated : 2021-01-14 06:35

NVD link : CVE-2018-18688

Mitre link : CVE-2018-18688

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature