What’s Vulnerable › Vulnerabilities

CVE-2021-43390

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-14 · updated 2026-06-17
• Weakness: CWE-787

Description

An Out-of-Bounds Write vulnerability exists when reading a DGN file using Open Design Alliance Drawings SDK before 2022.11. The specific issue exists within the parsing of DGN files. Crafted data in a DGN file and lack of proper validation of input data can trigger a write operation past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Affected products

• Opendesign Drawings Software Development Kit: before 2022.11 — fixed in 2022.11

How to fix

Upgrade to a fixed version: Opendesign Drawings Software Development Kit 2022.11. Check the vendor advisory for mitigations.

References

• https://www.opendesign.com/security-advisories
• https://www.zerodayinitiative.com/advisories/ZDI-21-1347/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1348/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1362/
• https://www.opendesign.com/security-advisories
• https://www.zerodayinitiative.com/advisories/ZDI-21-1347/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1348/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1362/

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