[2.4.0] Checkmk Werk 15328 created: mk_oracle: Follow-up to privilege escalation fix: sqlnet.ora

[//]: # (werk v2) # mk_oracle: Follow-up to privilege escalation fix: sqlnet.ora key | value ---------- | --- compatible | no version | 2.4.0b1 date | 2024-04-05T09:38:28+00:00 level | 1 class | fix component | checks edition | cre You are affected by this Werk if you use mk_oracle agent plugin on unix. <tt>mk_oracle</tt> only works if it can find a <tt>sqlnet.ora</tt> in your <tt>$TNS_ADMIN</tt> folder. In the past, <tt>mk_oracle</tt> executed all oracle binaries as root, so <tt>sqlnet.ora</tt> was alwas readable. With <a href="https://checkmk.com/werk/16232">Werk #16232</a> the oracle binaries are executed with a low privileged user, so it might be the case, that <tt>sqlnet.ora</tt> can not be read by this user. <tt>mk_oracle</tt> will exit early if it can not read <tt>sqlnet.ora</tt>. The error message might look like: <code> /etc/check_mk/sqlnet.ora can not be read by user "oracle"! Either use 'sqlnet.ora permission group' bakery rule, or directly modify permissions of the file. </code> The error message will also be visible in the <tt>oracle_instance</tt> check. If you use the agent bakery to roll out mk_oracle to unix servers using <tt>.rpm</tt>, <tt>.deb</tt> or Solaris <tt>.pkg</tt> packages, you have to use the 'sqlnet.ora permission group' bakery rule to adapt the group of the <tt>sqlnet.ora</tt> file, otherwise your permission changes might be overwritten by updating the agent. Otherwise it is sufficient to adapt the permissions. If you install the agent on Unix using the <tt>tgz</tt> package, you will have to manually adjust the permissions of the <tt>sqlnet.ora</tt> file.