CVE-2023-6612
Published: 08 December 2023
Summary
CVE-2023-6612 is a medium-severity OS Command Injection (CWE-78) vulnerability in Totolink X5000R Firmware. Its CVSS base score is 5.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 5.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability rated critical exists in the Totolink X5000R firmware version 9.1.0cu.2300_B20230112. Multiple functions within /cgi-bin/cstecgi.cgi, including setDdnsCfg, setDynamicRoute, setFirewallType, setIPSecCfg and numerous other set*Cfg handlers, accept unsanitized input that results in operating system command injection, as indicated by CWE-78. The issue was publicly disclosed with proof-of-concept material but received no vendor response.
An attacker with local network access and valid credentials can invoke the affected CGI endpoints to execute arbitrary commands on the device. Successful exploitation grants limited control over configuration and system behavior, corresponding to the CVSS vector AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Public references consist of a GitHub repository containing exploit details and VulDB entries that record the disclosure timeline; no patches or mitigation guidance are provided in these sources. The associated EPSS score has remained flat at 0.1381 with no material increase since publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-58835
Vulnerability details
A vulnerability was found in Totolink X5000R 9.1.0cu.2300_B20230112. It has been rated as critical. This issue affects the function setDdnsCfg/setDynamicRoute/setFirewallType/setIPSecCfg/setIpPortFilterRules/setLancfg/setLoginPasswordCfg/setMacFilterRules/setMtknatCfg/setNetworkConfig/setPortForwardRules/setRemoteCfg/setSSServer/setScheduleCfg/setSmartQosCfg/setStaticDhcpRules/setStaticRoute/setVpnAccountCfg/setVpnPassCfg/setVpnUser/setWiFiAclAddConfig/setWiFiEasyGuestCfg/setWiFiGuestCfg/setWiFiRepeaterConfig/setWiFiScheduleCfg/setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to os command injection. The exploit has been disclosed to the public and…
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may be used. The associated identifier of this vulnerability is VDB-247247. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection (CWE-78) in public-facing router CGI endpoints (/cgi-bin/cstecgi.cgi) enables T1190 (exploit public-facing web application), T1059.004 (Unix shell execution via injection), and T1202 (indirect command execution), as explicitly mapped in VulDB advisory.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.