BM 6 - Deploy Configuration file with a lot of special characters

[philippe.camelio_3885]

Hello

I am using BM to deploy HAProxy config and I need some help to add the following rules in a configuration file:

# ACL LOG4J  https://www.haproxy.com/blog/december-2021-log4shell-mitigation/
   option http-buffer-request
   acl log4shell url,url_dec -m reg \${[^}]*\${
   acl log4shell url,url_dec -m reg \${jndi:(?:ldaps?|iiop|dns|rmi)://
   acl log4shell url,url_dec -i -m reg \${[\w${}\-:]*j[\w${}\-:]*n[\w${}\-:]*d[\w${}\-:]*i[\w${}\-:]*:.*}
   acl log4shell req.hdrs -m reg \${[^}]*\${
   acl log4shell req.hdrs -m reg \${jndi:(?:ldaps?|iiop|dns|rmi)://
   acl log4shell req.hdrs -i -m reg \${[\w${}\-:]*j[\w${}\-:]*n[\w${}\-:]*d[\w${}\-:]*i[\w${}\-:]*:.*}
   acl log4shell_form req.body,url_dec -m reg \${[^}]*\${
   acl log4shell_form req.body,url_dec -m reg \${jndi:(?:ldaps?|iiop|dns|rmi)://
   acl log4shell_form req.body,url_dec -i -m reg \${[\w${}\-:]*j[\w${}\-:]*n[\w${}\-:]*d[\w${}\-:]*i[\w${}\-:]*:.*}
   http-request deny if log4shell
   http-request deny if { req.fhdr(content-type) -m str application/x-www-form-urlencoded } log4shell_form
   

Special characters break the deployment
I tried to add ` in front of $ unsuccessfully

Best regards
Philippe C.

[rhessinger]

Hi @philippe-camelio_3885,

In my experience you should only need to add ` in front of all the $ and that should work. Can you give this version a try?

# ACL LOG4J  https://www.haproxy.com/blog/december-2021-log4shell-mitigation/
   option http-buffer-request
   acl log4shell url,url_dec -m reg \`${[^}]*\`${
   acl log4shell url,url_dec -m reg \`${jndi:(?:ldaps?|iiop|dns|rmi)://
   acl log4shell url,url_dec -i -m reg \`${[\w`${}\-:]*j[\w`${}\-:]*n[\w`${}\-:]*d[\w`${}\-:]*i[\w`${}\-:]*:.*}
   acl log4shell req.hdrs -m reg \`${[^}]*\`${
   acl log4shell req.hdrs -m reg \`${jndi:(?:ldaps?|iiop|dns|rmi)://
   acl log4shell req.hdrs -i -m reg \`${[\w`${}\-:]*j[\w`${}\-:]*n[\w`${}\-:]*d[\w`${}\-:]*i[\w`${}\-:]*:.*}
   acl log4shell_form req.body,url_dec -m reg \`${[^}]*\`${
   acl log4shell_form req.body,url_dec -m reg \`${jndi:(?:ldaps?|iiop|dns|rmi)://
   acl log4shell_form req.body,url_dec -i -m reg \`${[\w`${}\-:]*j[\w`${}\-:]*n[\w`${}\-:]*d[\w`${}\-:]*i[\w`${}\-:]*:.*}
   http-request deny if log4shell
   http-request deny if { req.fhdr(content-type) -m str application/x-www-form-urlencoded } log4shell_form

Thanks,
Rich

[philippe.camelio_3885]

Thanks you Rich
it is working !.