CRITICAL: CVE-2021-4473 (CVSS 9.8) — topsecgroup tianxin internet behavior management system

CVE: CVE-2021-4473

CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

topsecgroup tianxin internet behavior management system

Summary

Tianxin Internet Behavior Management System contains a command injection vulnerability in the Reporter component endpoint that allows unauthenticated attackers to execute arbitrary commands by supplying a crafted objClass parameter containing shell metacharacters and output redirection. Attackers can exploit this vulnerability to write malicious PHP files into the web root and achieve remote code execution with the privileges of the web server process. This vulnerability has been fixed in version NACFirmware_4.0.0.7_20210716.180815_topsec_0_basic.bin. Exploitation evidence was first observed by the Shadowserver Foundation on 2024-06-01 (UTC).

Verified Sources

References

https://avd.aliyun.com/detail?id=AVD-2021-890232
https://cn-sec.com/archives/4631959.html
https://www.cnvd.org.cn/flaw/show/CNVD-2021-41972
https://www.cnvd.org.cn/patchInfo/show/280166
https://www.vulncheck.com/advisories/tianxin-internet-behavior-management-system-command-injection-via-toquery-php

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._

Lyrie Verdict

A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.

#topsecgroup #critical