Test ID:	1.3.6.1.4.1.25623.1.1.1.2.2016.602
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DLA-602-1)
Summary:	The remote host is missing an update for the Debian 'gnupg' package(s) announced via the DLA-602-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'gnupg' package(s) announced via the DLA-602-1 advisory. Vulnerability Insight: CVE-2016-6313 Felix Doerre and Vladimir Klebanov from the Karlsruhe Institute of Technology discovered a flaw in the mixing functions of GnuPG's random number generator. An attacker who obtains 4640 bits from the RNG can trivially predict the next 160 bits of output. A first analysis on the impact of this bug for GnuPG shows that existing RSA keys are not weakened. For DSA and Elgamal keys it is also unlikely that the private key can be predicted from other public information. Bypassing GnuPG key checking Weaknesses have been found in GnuPG signature validation that attackers could exploit thanks to especially forged public keys and under specific hardware-software conditions. While the underlying problem cannot be solved only by software, GnuPG has been strengthened, avoiding to rely on keyring signature caches when verifying keys. Potential specific attacks are not valid any more with the patch of GnuPG Bypassing GnuPG key checking: Vrije Universiteit Amsterdam and Katholieke Universteit Leuven researchers discovered an attack method, known as Flip Feng Shui, that concerns flaws in GnuPG. Researchers found that under specific hardware-software conditions, attackers could bypass the GnuPG signature validation by using forged public keys. While the underlying problem cannot be solved only by software, GnuPG has been made more robust to avoid relying on keyring signature caches when verifying keys. For Debian 7 Wheezy, these issues have been addressed in version 1.4.12-7+deb7u8. We recommend that you upgrade your gnupg packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references] Affected Software/OS: 'gnupg' package(s) on Debian 7. Solution: Please install the updated package(s). CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2016-6313 BugTraq ID: 92527 http://www.securityfocus.com/bid/92527 Debian Security Information: DSA-3649 (Google Search) http://www.debian.org/security/2016/dsa-3649 Debian Security Information: DSA-3650 (Google Search) http://www.debian.org/security/2016/dsa-3650 https://security.gentoo.org/glsa/201610-04 https://security.gentoo.org/glsa/201612-01 https://lists.gnupg.org/pipermail/gnupg-announce/2016q3/000395.html RedHat Security Advisories: RHSA-2016:2674 http://rhn.redhat.com/errata/RHSA-2016-2674.html http://www.securitytracker.com/id/1036635 http://www.ubuntu.com/usn/USN-3064-1 http://www.ubuntu.com/usn/USN-3065-1
Copyright	Copyright (C) 2023 Greenbone AG

This is only one of 145615 vulnerability tests in our test suite. Find out more about running a complete security audit. To run a free test of this vulnerability against your system, register below.