VULNERABILITY INTELLIGENCE

CVE-2020-27540

CVSS score9.8 CRITICAL
EPSS probability0.84%
CISA KEVNot currently listed
Published2021-01-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Bash injection vulnerability and bypass of signature verification in Rostelecom CS-C2SHW 5.0.082.1. The camera reads firmware update configuration from SD card file vc\version.json. fw-sign parameter and from this configuration is directly inserted into a bash command. Firmware update is run automatically if there is special file on the inserted SD card.

Weakness classification

  • CWE-347: Improper Verification of Cryptographic Signature

Primary references