Arch Linux Security Advisory ASA-201606-10
=========================================
Severity: Medium
Date    : 2016-06-10
CVE-ID  : CVE-2016-4456
Package : gnutls
Type    : arbitrary file overwrite
Remote  : No
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package gnutls before version 3.4.13-1 is vulnerable to arbitrary
file overwrite.

Resolution
=========
Upgrade to 3.4.13-1.

# pacman -Syu "gnutls>=3.4.13-1"

The problem has been fixed upstream in version 3.4.13.

Workaround
=========
None.

Description
==========
Setuid programs using GnuTLS could potentially allow an attacker to
overwrite and corrupt arbitrary files in the filesystem. This issue was
introduced in GnuTLS 3.4.12 with the GNUTLS_KEYLOGFILE environment
variable handling via getenv() and fixed in GnuTLS 3.4.13 by switching
to secure_getenv() where available.

Impact
=====
A local attacker is able to overwrite arbitrary files with a setuid
program using GnuTLS by setting the GNUTLS_KEYLOGFILE environment
variable.

References
=========
https://access.redhat.com/security/cve/CVE-2016-4456
http://gnutls.org/security.html#GNUTLS-SA-2016-1

ArchLinux: 201606-10: gnutls: arbitrary file overwrite

June 10, 2016

Summary

Setuid programs using GnuTLS could potentially allow an attacker to overwrite and corrupt arbitrary files in the filesystem. This issue was introduced in GnuTLS 3.4.12 with the GNUTLS_KEYLOGFILE environment variable handling via getenv() and fixed in GnuTLS 3.4.13 by switching to secure_getenv() where available.

Resolution

Upgrade to 3.4.13-1. # pacman -Syu "gnutls>=3.4.13-1"
The problem has been fixed upstream in version 3.4.13.

References

https://access.redhat.com/security/cve/CVE-2016-4456 http://gnutls.org/security.html#GNUTLS-SA-2016-1

Severity
Package : gnutls
Type : arbitrary file overwrite
Remote : No
Link : https://wiki.archlinux.org/title/CVE

Workaround

None.

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