MongoDB must enforce authorized access to all PKI private keys stored/utilized by MongoDB. (Cat I impact)
The DoD standard for authentication is DoD-approved PKI certificates. PKI certificate-based authentication is performed by requiring the certificate holder to cryptographically prove possession of the corresponding private key. If the private key is stolen, an attacker can use the private key(s) to impersonate the certificate holder. In cases where MongoDB-stored private keys are used to authenticate MongoDB to the system’s clients, loss of the corresponding private keys would allow an attacker to successfully perform undetected man in the middle attacks against MongoDB system and its clients. Both the holder of a digital certificate and the issuing authority must take careful measures to protect the corresponding private key. Private keys should always be generated and protected in FIPS 140-2 validated cryptographic modules. All access to the private key(s) of MongoDB must be restricted to authorized and authenticated users. If unauthorized users have access to one or more of MongoDB's private keys, an attacker could gain access to the key(s) and use them to impersonate the database on the network or otherwise perform unauthorized actions.
In the MongoDB database configuration file (default location: /etc/mongod.conf), review the following parameters: net: ssl: mode: requireSSL PEMKeyFile: /etc/ssl/mongodb.pem CAFile: /etc/ssl/mongodbca.pem Verify ownership, group ownership, and permissions on the file given for PEMKeyFile (default 'mongodb.pem'). Run following command and review its output: ls -al /etc/mongod.conf typical output: -rw------- 1 mongod mongod 566 Apr 26 20:20 /etc/mongod.conf If the user owner is not "mongod", this is a finding. If the group owner is not "mongod", this is a finding. If the file is more permissive than "600", this is a finding. Verify ownership, group ownership, and permissions on the file given for CAFile (default 'ca.pem'). If the user owner is not "mongod", this is a finding. If the group owner is not "mongod", this is a finding. If the file is more permissive than "600", this is a finding.
Run these commands: "chown mongod:mongod /etc/ssl/mongodb.pem" "chmod 600 /etc/ssl/mongodb.pem" "chown mongod:mongod /etc/ssl/mongodbca.pem" "chmod 600 /etc/ssl/mongodbca.pem"
Rule ID: SV-221172r457869_rule
Vulnerability ID: V-221172
Group Title: SRG-APP-000176-DB-000068
The information system, for PKI-based authentication, enforces authorized access to the corresponding private key.