CVE-2020-1733

NameCVE-2020-1733
DescriptionA race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior 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'.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ansible (PTS)jessie1.7.2+dfsg-2vulnerable
jessie (security)1.7.2+dfsg-2+deb8u2vulnerable
stretch (security), stretch2.2.1.0-2+deb9u1vulnerable
buster2.7.7+dfsg-1vulnerable
bullseye, sid2.9.6+dfsg-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ansiblesource(unstable)(unfixed)

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=1801735

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