Race condition in Python - CVE-2014-2667
Published: November 16, 2014 / Updated: August 9, 2020
Vulnerability identifier: #VU41102
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2014-2667
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Python.org
Affected software:
Python
Python
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Race condition in the _get_masked_mode function in Lib/os.py in Python 3.2 through 3.5, when exist_ok is set to true and multiple threads are used, might allow local users to bypass intended file permissions by leveraging a separate application vulnerability before the umask has been set to the expected value.
How to mitigate CVE-2014-2667
Install update from vendor's website.
Sources
- http://bugs.python.org/issue21082
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00007.html
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.html
- http://www.openwall.com/lists/oss-security/2014/03/28/15
- http://www.openwall.com/lists/oss-security/2014/03/29/5
- http://www.openwall.com/lists/oss-security/2014/03/30/4
- https://security.gentoo.org/glsa/201503-10