CVE-2016-4456 Path traversal in n/a
Remote attackers can overwrite arbitrary files via the GNUTLS_KEYLOGFILE environment variable, requiring specific configuration to exploit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-4456?
CVE-2016-4456 is a high-severity path traversal vulnerability in Gnu Gnutls, published on 8 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.
Weakness: CWE-20
Which versions are affected by CVE-2016-4456?
It affects 1 product.
Products include Gnu Gnutls.
How do I fix CVE-2016-4456?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2016-4456 being exploited?
There is no known exploitation of CVE-2016-4456 in the wild and no public exploit code.
Other vulnerabilities in Gnu Gnutls
Sources
Also known as DEBIAN-CVE-2016-4456, GHSA-f425-wv72-9hrq.