[Snort-sigs] CVE-2018-1143, CVE-2018-1144, CVE-2018-1146

Y M snort at outlook.com
Fri Apr 27 14:25:51 EDT 2018

Thanks for the comments, David. I initially thought the same, but according to the reference and the recent Drupal exploit traffic we are seeing, the detection should still be valid.

However, I haven’t tested this. So my comments above are yet to be validated. I will definitely check the reference you pointed out.

Thanks again.

From: David <snort-sigs at davidwharton.us>
Sent: Friday, April 27, 2018 8:58:06 PM
To: Y M; snort-sigs
Subject: Re: [Snort-sigs] CVE-2018-1143, CVE-2018-1144, CVE-2018-1146

The http_uri buffer is normalized so you aren't going to see "/%60" in it; try "/|60|" if you want to match in the normalize buffer.

For pcap creation and testing, let me suggest Dalton -- https://github.com/secureworks/dalton


On 04/27/2018 10:47 AM, Y M via Snort-sigs wrote:

The below signatures attempt at detecting exploits against the listed CVEs. No pcaps available.

# Title: Belkin N750 F9K1103 v1 Multiple Vulnerabilities
# Reference: www.tenable.com/security/research/tra-2018-0<http://www.tenable.com/security/research/tra-2018-08>9
# CVEs: CVE-2018-1143, CVE-2018-1144, CVE-2018-1146

alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"SERVER-WEBAPP Belkin twonky blind command injection attempt"; flow:to_server,established; content:"/twonky_cmd.cgi?"; fast_pattern:only; http_uri; content:"?path="; http_uri; content:"/%60"; http_uri; metadata:ruleset community, service http; reference:cve,2018-1143; reference:url,www.tenable.com/security/research/tra-2018-08<http://www.tenable.com/security/research/tra-2018-08>; classtype:attempted-admin; sid:8000009; rev:1;)
alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"SERVER-WEBAPP Belkin proxy.cgi command injection attempt"; flow:to_server,established; content:"/proxy.cgi?"; fast_pattern:only; http_uri; content:"url=|60|"; http_uri; metadata:ruleset community, service http; reference:cve,2018-1144; reference:url,www.tenable.com/security/research/tra-2018-08<http://www.tenable.com/security/research/tra-2018-08>; classtype:attempted-admin; sid:8000010; rev:1;)
alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"SERVER-WEBAPP Belkin unauthenticated telnet enablement attempt"; flow:to_server,established; content:"/set.cgi?"; fast_pattern:only; http_uri; content:"n=TELENT_EN"; http_uri; content:"&v=1"; distance:0; http_uri; metadata:ruleset community, service http; reference:cve,2018-1146; reference:url,www.tenable.com/security/research/tra-2018-08<http://www.tenable.com/security/research/tra-2018-08>; classtype:attempted-admin; sid:8000011; rev:1;)


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