What is CVE-2020-27540?

CVE-2020-27540 is a critical-severity vulnerability in Company Cs-C2shw, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2021-01-26.

How severe is CVE-2020-27540?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Company Cs-C2shw

CVE-2020-27540

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.

EPSS: 0.008 (53.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Company Cs-c2shw
Company Cs-c2shw_firmware — versions 5.0.082.1
N/a — versions n/a

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-27540?: CVE-2020-27540 is a critical-severity vulnerability in Company Cs-C2shw, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2021-01-26.
How severe is CVE-2020-27540?: Critical severity. CVSS v3 base score is 9.8 out of 10.