CVE Catalog

CVE-2021-4479

MediumCVSS 4.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.24%

15th percentile - higher than 15% of all known CVEs

Summary

Dräger Atlan A350 versions 1.00 to 1.01 have an improper input handling vulnerability via the Medibus interface. Sending specially crafted non-Medibus-compliant data can overload the processor, gradually disrupting device operation over hours, causing data loss, delayed curve display, and pressure deviations.

Risk Assessment

An attacker can cause gradual degradation of ventilator performance, potentially affecting patient safety.

Recommendation

Update Dräger Atlan A350 firmware to the latest version. Restrict Medibus interface access to trusted devices only.

Related vulnerabilities

Original NVD description (English source)

Dräger Atlan A350 versions 1.00 up to and including 1.01 contains an improper input handling vulnerability that allows attackers to cause a denial of service by sending specifically crafted non-Medibus-compliant data through the Medibus interface. Attackers can transmit malformed data to overload the internal processor, gradually disrupting device operation over several hours and causing loss of data transmission, delayed display of real-time curves, and deviation between displayed airway pressure values and screen curves.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS