CVE-2025-34036

Description

An OS command injection vulnerability exists in white-labeled DVRs manufactured by TVT, affecting a custom HTTP service called "Cross Web Server" that listens on TCP ports 81 and 82. The web interface fails to sanitize input in the URI path passed to the language extraction functionality. When the server processes a request to /language/[lang]/index.html, it uses the [lang] input unsafely in a tar extraction command without proper escaping. This allows an unauthenticated remote attacker to inject shell commands and achieve arbitrary command execution as root.

Reserved 2025-04-15 | Published 2025-06-24 | Updated 2025-06-24 | Assigner VulnCheck

Problem types

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-20 Improper Input Validation

Product status

Default status
unaffected

Any version
affected

Credits

Ophir Harpaz (k1p0d) finder

References

web.archive.org/...emote-code-execution-in-cctv-dvrs-of.html third-party-advisory exploit technical-description

www.exploit-db.com/exploits/39596 third-party-advisory exploit

vulncheck.com/...ies/shenzhen-tvt-cctv-dvr-command-injection third-party-advisory

cve.org (CVE-2025-34036)

nvd.nist.gov (CVE-2025-34036)

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