CVE-2014-1858 Arbitrary file write in NumPy

Medium 5.5 Published 8 Jan 2018 Updated 6 Aug 2024

Local attackers can overwrite arbitrary files via symlink attacks on temporary files in NumPy's f2py module.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2014-1858?

CVE-2014-1858 is a medium-severity path traversal vulnerability in n/a, published on 8 Jan 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

__init__.py in f2py in NumPy before 1.8.1 allows local users to write to arbitrary files via a symlink attack on a temporary file.

Weakness: CWE-20

Which versions are affected by CVE-2014-1858?

3 open source packages ship an affected version, including numpy. It affects 1 product.

Package	Affected	Fixed in
`numpy` PyPI	All versions	`1.8.1`
`numpy` PyPI	All versions	`1.8.1`
`numpy` PyPI	All versions	`1.8.1`

Products include Numpy Numpy.

How do I fix CVE-2014-1858?

Upgrade numpy to 1.8.1 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2014-1858 being exploited?

There is no known exploitation of CVE-2014-1858 in the wild and no public exploit code.

Sources

Also known as GHSA-cw6w-4rcx-xphc, PYSEC-2018-33.