Critical severity9.8NVD Advisory· Published Jan 26, 2021· Updated Jun 17, 2026
CVE-2020-27540
CVE-2020-27540
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.
Affected products
2- Rostelecom/CS-C2SHWdescription
- Range: 5.0.082.1
Patches
Vulnerability mechanics
References
1- dil4rd.medium.com/groundhog-day-in-iot-valley-or-5-cves-in-1-camera-7dc1d2864707nvdExploitThird Party Advisory
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