Security researchers discovered bugs in DigiEver in July 2023 and reported them to TWCERT/CC. DigiEver closed the case in August 2023, citing that the device had been out of date for five years. Now, in 2025, the vulnerabilities are still being exploited—an analysis.
Subsequently, two CVE numbers were reserved for these bugs in mid-December 2023. But the story didn't end there, because in December 2024, it was revealed that a botnet called Hail Cock had exploited one of these bugs, meaning the vulnerability was still open. Two post-authentication remote code execution flaws were found in unknown versions of DigiEver DVRs. A Mirai botnet was actively exploiting this flaw at the end of 2024. It is unclear exactly which models and versions of DigiEver devices are affected, but it is likely that most are affected.
The vulnerabilities in DigiEver
The vulnerabilities have been assigned the following CVE numbers: CVE-2023-52163, time_tzsetup.cgi command injection.
CVE-2023-52164, access_device.cgi: Arbitrary reading of files. To exploit both vulnerabilities, the attacker must be logged in to the device and submit a crafted request. However, since these vulnerabilities are therefore only exploitable after authentication, the following mitigations may be useful:
- Das Gerat should not be connected to the Internet. Use a firewall or gateway to protect the device's management interface.
- The default username and the device's default password should be changed.
In addition, our network products can detect the vulnerabilities: #1233322, WEB DigiEver DS-2105 Pro Command Injection.
#1236155, WEB Digiever DS-2105 Pro Authenticated reading of any files.
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DigiEver DVRs use a common code base across different devices. The vulnerabilities were discovered by analyzing the recovery image available on the website. Upon further investigation, it appears that DigiEver implements a CGI gateway in /cgi-bin/cgi_main.cgi. All functions are mediated through this endpoint, and various CGI scripts can be invoked through this endpoint.
Remedy for the DigiEver vulnerability
We provide the following Snort 3 rules to detect exploitation of both vulnerabilities. Please use against CVE-2023-52163 (Command Injection):
alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:“WEB-CGI Digiever DS-2105 Pro Command Injection”; flow:to_server,established; http_uri; content:“/cgi-bin/cgi_main.cgi“; http_client_body; content:“cgiName=time_tzsetup.cgi“; pcre:"/ntp=[0-9a-zA-Z\.\s]*[|`\;]/"; reference:cve,2023-52163; classtype:web-application-attack; rev:1000001;).
Against CVE-2023-52164 (Arbitrary File Read) please use:
alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:“WEB-CGI Digiever DS-2105 Authenticated Arbitrary File Read”; flow:to_server,established; http_uri;content:“/cgi-bin/cgi_main.cgi“; http_client_body; content:“cgiName=access_device.cgi“; pcre:“/fileName=(\/|\w+\/\.\./)/“; reference:cve,2023-52164; classtype:web-application-attack; (Mirco Kloss, Business Development Director DACH at TXOne Networks)
More at TXOne.com
About TXOne Networks
TXOne Networks provides IT security products that ensure the reliability and security of industrial control systems and operational technology environments through the OT Zero Trust methodology. TXOne Networks works with both leading manufacturers in the business and operators of critical infrastructure to develop practical and operationally friendly approaches to IT defense.
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