MGASA-2020-0217

Updated ansible package fixes security vulnerabilities:

A race condition flaw was found in Ansible Engine when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with "umask 77 && mkdir -p <dir>"; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc/<pid>/cmdline' (CVE-2020-1733).

A flaw was found in the Ansible Engine when the fetch module is used. An attacker could intercept the module, inject a new path, and then choose a new destination path on the controller node (CVE-2020-1735).

A flaw was found in the Ansible Engine when using the Extract-Zip function from the win_unzip module as the extracted file(s) are not checked if they belong to the destination folder. An attacker could take advantage of this flaw by crafting an archive anywhere in the file system, using a path traversal (CVE-2020-1737).

A flaw was found in Ansible Engine. When a password is set with the argument "password" of svn module, it is used on svn command line, disclosing to other users within the same node. An attacker could take advantage by reading the cmdline file from that particular PID on the procfs (CVE-2020-1739).

A flaw was found in Ansible Engine when using Ansible Vault for editing encrypted files. When a user executes "ansible-vault edit", another user on the same computer can read the old and new secret, as it is created in a temporary file with mkstemp and the returned file descriptor is closed and the method write_data is called to write the existing secret in the file. This method will delete the file before recreating it insecurely (CVE-2020-1740).

A flaw was found in the Ansible Engine when the ldapattr and ldapentry community modules are used. The issue discloses the LDAP bind password to stdout or a log file if a playbook task is written using the bind_pw in the parameters field. The highest threat from this vulnerability is data confidentiality (CVE-2020-1746).

A security flaw was found in the Ansible Engine when managing Kubernetes using the k8s connection plugin. Sensitive parameters such as passwords and tokens are passed to the kubectl command line instead of using environment variables or an input configuration file, which is safer. This flaw discloses passwords and tokens from the process list, and the no_log directive from the debug module would not be reflected in the underlying command-line tools options, displaying passwords and tokens on stdout and log files (CVE-2020-1753).

A flaw was found in the Ansible Engine. When using ansiblefacts as a subkeyof itself, and promoting it to a variable when injecting is enabled, overwriting the ansiblefacts after the clean, an attacker could take advantage of this by altering the ansible_facts leading to privilege escalation or code injection. The highest threat from this vulnerability are to data integrity and system availability (CVE-2020-10684).

A flaw was found on Ansible Engine when using modules which decrypts vault files such as assemble, script, unarchive, wincopy, awss3 or copy modules. The temporary directory is created in /tmp leaves the secrets unencrypted. On Operating Systems which /tmp is not a tmpfs but part of the root partition, the directory is only cleared on boot and the decrypted data remains when the host is switched off. The system will be vulnerable when the system is not running. So decrypted data must be cleared as soon as possible and the data which normally is encrypted is sensible (CVE-2020-10685).