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More changes to address FPs. #209

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Feb 22, 2017
Merged

More changes to address FPs. #209

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7 changes: 4 additions & 3 deletions rules/falco_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,7 @@

# dpkg -L login | grep bin | xargs ls -ld | grep -v '^d' | awk '{print $9}' | xargs -L 1 basename | tr "\\n" ","
- list: login_binaries
items: [login, systemd, systemd-logind, su, nologin, faillog, lastlog, newgrp, sg]
items: [login, systemd, '"(systemd)"', systemd-logind, su, nologin, faillog, lastlog, newgrp, sg]

# dpkg -L passwd | grep bin | xargs ls -ld | grep -v '^d' | awk '{print $9}' | xargs -L 1 basename | tr "\\n" ","
- list: passwd_binaries
Expand Down Expand Up @@ -256,7 +256,7 @@
package_mgmt_binaries, ssl_mgmt_binaries, dhcp_binaries,
ldconfig.real, ldconfig, confd, gpg, insserv,
apparmor_parser, update-mime, tzdata.config, tzdata.postinst,
systemd-machine, debconf-show, rollerd, bind9.postinst)
systemd-machine, debconf-show, rollerd, bind9.postinst, sv)
and not proc.pname in (sysdigcloud_binaries)
and not fd.directory in (/etc/cassandra, /etc/ssl/certs/java)
and not ansible_running_python
Expand Down Expand Up @@ -469,7 +469,7 @@
tags: [host, users]

- list: allowed_dev_files
items: [/dev/null, /dev/stdin, /dev/stdout, /dev/stderr, /dev/tty, /dev/random, /dev/urandom, /dev/console]
items: [/dev/null, /dev/stdin, /dev/stdout, /dev/stderr, /dev/random, /dev/urandom, /dev/console]

# (we may need to add additional checks against false positives, see: https://bugs.launchpad.net/ubuntu/+source/rkhunter/+bug/86153)
- rule: Create files below dev
Expand All @@ -479,6 +479,7 @@
(evt.type = creat or (evt.type = open and evt.arg.flags contains O_CREAT))
and not proc.name in (dev_creation_binaries)
and not fd.name in (allowed_dev_files)
and not fd.name startswith /dev/tty
output: "File created below /dev by untrusted program (user=%user.name command=%proc.cmdline file=%fd.name)"
priority: WARNING
tags: [filesystem]
Expand Down