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AUSCERT External Security Bulletin Redistribution
ansible security update
6 May 2020
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Increased Privileges -- Existing Account
Access Confidential Data -- Existing Account
CVE Names: CVE-2020-1740 CVE-2020-1739 CVE-2020-1733
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Package : ansible
Version : 1.7.2+dfsg-2+deb8u3
CVE ID : CVE-2019-14846 CVE-2020-1733 CVE-2020-1739 CVE-2020-1740
Debian Bug : 942188
Several vulnerabilities were discovered in Ansible, a configuration
management, deployment, and task execution system.
Ansible was logging at the DEBUG level which lead to a disclosure
of credentials if a plugin used a library that logged credentials
at the DEBUG level. This flaw does not affect Ansible modules, as
those are executed in a separate process.
A race condition flaw was found 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'.
A flaw was found 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.
A flaw was found 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.
For Debian 8 "Jessie", these problems have been fixed in version
We recommend that you upgrade your ansible packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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