CVE-2018-18688
Foxit and Other PDF Readers Incremental Saving Signature Validation Bypass
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.
INFO
Published Date :
Jan. 7, 2021, 6:15 p.m.
Last Modified :
Jan. 14, 2021, 6:35 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2018-18688
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-18688.
| URL | Resource |
|---|---|
| https://pdf-insecurity.org/signature/evaluation_2018.html | Third Party Advisory |
| https://pdf-insecurity.org/signature/signature.html | Third Party Advisory |
| https://www.foxitsoftware.com/support/security-bulletins.php | Vendor Advisory |
| https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-18688 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-18688 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jan. 14, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://pdf-insecurity.org/signature/evaluation_2018.html No Types Assigned https://pdf-insecurity.org/signature/evaluation_2018.html Third Party Advisory Changed Reference Type https://pdf-insecurity.org/signature/signature.html No Types Assigned https://pdf-insecurity.org/signature/signature.html Third Party Advisory Changed Reference Type https://www.foxitsoftware.com/support/security-bulletins.php No Types Assigned https://www.foxitsoftware.com/support/security-bulletins.php Vendor Advisory Changed Reference Type https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/ No Types Assigned https://www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/ Third Party Advisory Added CWE NIST CWE-347 Added CPE Configuration AND OR *cpe:2.3:a:code-industry:master_pdf_editor:5.1.12:*:*:*:*:*:*:* *cpe:2.3:a:code-industry:master_pdf_editor:5.1.68:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:foxit_reader:9.4:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:phantompdf:8.3.9:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:* versions from (including) 9.0 up to (excluding) 9.4 *cpe:2.3:a:gonitro:nitro_pro:11.0.3.173:*:*:*:*:*:*:* *cpe:2.3:a:gonitro:nitro_reader:5.5.9.2:*:*:*:*:*:*:* *cpe:2.3:a:iskysoft:pdf_editor_6:6.4.2.3521:*:*:*:professional:*:*:* *cpe:2.3:a:iskysoft:pdfelement6:6.8.0.3523:*:*:*:professional:*:*:* *cpe:2.3:a:iskysoft:pdfelement6:6.8.4.3921:*:*:*:professional:*:*:* *cpe:2.3:a:libreoffice:libreoffice:6.0.6.2:*:*:*:*:*:*:* *cpe:2.3:a:libreoffice:libreoffice:6.1.3.2:*:*:*:*:*:*:* *cpe:2.3:a:nuance:power_pdf_standard:3.0.0.17:*:*:*:*:*:*:* *cpe:2.3:a:nuance:power_pdf_standard:3.0.0.30:*:*:*:*:*:*:* *cpe:2.3:a:nuance:power_pdf_standard:7.0:*:*:*:*:*:*:* *cpe:2.3:a:qoppa:pdf_studio:12.0.7:*:*:*:professional:*:*:* *cpe:2.3:a:qoppa:pdf_studio_viewer_2018:2018.0.1:*:*:*:*:*:*:* *cpe:2.3:a:qoppa:pdf_studio_viewer_2018:2018.2.0:*:*:*:*:*:*:* *cpe:2.3:a:soft-xpansion:perfect_pdf_10:10.0.0.1:*:*:*:premium:*:*:* *cpe:2.3:a:soft-xpansion:perfect_pdf_reader:13.0.3:*:*:*:*:*:*:* *cpe:2.3:a:soft-xpansion:perfect_pdf_reader:13.1.5:*:*:*:*:*:*:* OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:code-industry:master_pdf_editor:5.1.12:*:*:*:*:*:*:* *cpe:2.3:a:code-industry:master_pdf_editor:5.1.68:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:foxit_reader:9.1.0:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:foxit_reader:9.2.0:*:*:*:*:*:*:* *cpe:2.3:a:libreoffice:libreoffice:6.0.6.2:*:*:*:*:*:*:* *cpe:2.3:a:libreoffice:libreoffice:6.1.3.2:*:*:*:*:*:*:* *cpe:2.3:a:qoppa:pdf_studio:12.0.7:*:*:*:professional:*:*:* *cpe:2.3:a:qoppa:pdf_studio_viewer_2018:2018.0.1:*:*:*:*:*:*:* *cpe:2.3:a:qoppa:pdf_studio_viewer_2018:2018.2.0:*:*:*:*:*:*:* OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:code-industry:master_pdf_editor:5.1.24:*:*:*:*:*:*:* *cpe:2.3:a:code-industry:master_pdf_editor:5.1.68:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:foxit_reader:9.1.0:*:*:*:*:*:*:* *cpe:2.3:a:foxitsoftware:foxit_reader:9.2.0:*:*:*:*:*:*:* *cpe:2.3:a:iskysoft:pdf_editor_6:6.6.2.3315:*:*:*:professional:*:*:* *cpe:2.3:a:iskysoft:pdf_editor_6:6.7.6.3399:*:*:*:professional:*:*:* *cpe:2.3:a:iskysoft:pdfelement6:6.7.1.3355:*:*:*:professional:*:*:* *cpe:2.3:a:iskysoft:pdfelement6:6.7.6.3399:*:*:*:professional:*:*:* *cpe:2.3:a:libreoffice:libreoffice:6.1.0.3:*:*:*:*:*:*:* *cpe:2.3:a:libreoffice:libreoffice:6.1.3.2:*:*:*:*:*:*:* *cpe:2.3:a:qoppa:pdf_studio:12.0.7:*:*:*:professional:*:*:* *cpe:2.3:a:qoppa:pdf_studio_viewer_2018:2018.0.1:*:*:*:*:*:*:* *cpe:2.3:a:qoppa:pdf_studio_viewer_2018:2018.2.0:*:*:*:*:*:*:* OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-18688 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-18688
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.18 }} 0.02%
score
0.54329
percentile