Vulnerability in Apple macOS
CVE-2018-18689
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.036 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.036 · change: -0.001
Affected products
- Apple macOS
- Avanquest Expert Pdf Ultimate — versions 12.0.20
- Avanquest Pdf Experte Ultimate — versions 9.0.270
- Foxitsoftware Foxit Reader — versions 9.1.0, 9.2.0.9297, 9.3.0.10826
- Gonitro Nitro Pro — versions 11.0.3.173
- Gonitro Nitro Reader — versions 5.5.9.2
- Iskysoft Pdf Editor 6 — versions 6.4.2.3521, 6.6.2.3315, 6.7.6.3399
- Iskysoft Pdfelement6 — versions 6.8.0.3523, 6.8.4.3921, 6.7.1.3355
- Linux Kernel
- Microsoft Windows
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.foxitsoftware.com/support/security-bulletins.php (Vendor Advisory)
- pdf-insecurity.org/signature/evaluation_2018.html (Third Party Advisory)
- pdf-insecurity.org/signature/signature.html (Third Party Advisory)
- www.pdfa.org/recently-identified-pdf-digital-signature-vulnerabilities/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2018-18689?
- CVE-2018-18689 is a medium-severity vulnerability in Apple macOS, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.3/10. Published 2021-01-07.
- How severe is CVE-2018-18689?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2018-18689 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.