CVE-2016-4456: Input Validation
First published: Tue Jun 07 2016(Updated: )
It was reported that gnutls 3.4.12 uses an environment variable (GNUTLS_KEYLOGFILE) to write the keys of the running sessions. This variable is obtained insecurely via getenv(), meaning that any set-uid program using gnutls can be used to overwrite any file on the filesystem. Upstream patch: <a href="https://gitlab.com/gnutls/gnutls/compare/fb2a6baef79f4aadfd95e657fe5a18da20a1410e...86076c9b17b9a32b348cafb8b724f57f7da64d58">https://gitlab.com/gnutls/gnutls/compare/fb2a6baef79f4aadfd95e657fe5a18da20a1410e...86076c9b17b9a32b348cafb8b724f57f7da64d58</a> External References: <a href="http://gnutls.org/security.html#GNUTLS-SA-2016-1">http://gnutls.org/security.html#GNUTLS-SA-2016-1</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/gnutls | <3.4.13 | 3.4.13 |
| GnuTLS | =3.4.12 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://www.openwall.com/lists/oss-security/2016/06/07/6
- https://bugzilla.redhat.com/show_bug.cgi?id=1343505
- https://gitlab.com/gnutls/gnutls/compare/fb2a6baef79f4aadfd95e657fe5a18da20a1410e...86076c9b17b9a32b348cafb8b724f57f7da64d58
- http://gnutls.org/security.html#GNUTLS-SA-2016-1
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1343508
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1343342
- https://www.gnutls.org/security.html#GNUTLS-SA-2016-1
- https://gitlab.com/gnutls/gnutls/commit/b0a3048e56611a2deee4976aeba3b8c0740655a6
Frequently Asked Questions
What is the severity of CVE-2016-4456?
CVE-2016-4456 has a medium severity level due to potential unauthorized file access.
How do I fix CVE-2016-4456?
To fix CVE-2016-4456, upgrade the gnutls package to version 3.4.13 or later.
What is the impact of CVE-2016-4456?
The impact of CVE-2016-4456 enables a set-uid program using gnutls to overwrite any file on the filesystem.
Which versions of gnutls are affected by CVE-2016-4456?
CVE-2016-4456 affects gnutls version 3.4.12 and earlier.
Is CVE-2016-4456 associated with any specific software?
Yes, CVE-2016-4456 specifically affects the gnutls software package.
- agent/references
- agent/type
- agent/first-publish-date
- agent/author
- agent/weakness
- agent/severity
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2016-4456
- agent/software-canonical-lookup
- agent/trending
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/redhat
- vendor/gnu
- canonical/gnutls
- version/gnutls/3.4.12