What’s Vulnerable › Vulnerabilities

CVE-2021-43391

• 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-125

Description

An Out-of-Bounds Read vulnerability exists when reading a DXF file using Open Design Alliance Drawings SDK before 2022.11. The specific issue exists within the parsing of DXF files. Crafted data in a DXF file (an invalid dash counter in line types) can trigger a read 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://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdf
• https://www.opendesign.com/security-advisories
• https://www.zerodayinitiative.com/advisories/ZDI-21-1352/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1361/
• https://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdf
• https://www.opendesign.com/security-advisories
• https://www.zerodayinitiative.com/advisories/ZDI-21-1352/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1361/

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