CVE-2016-6313

Name: CVE-2016-6313
Creator: NVD / NIST
Published: 2016-12-13T20:59:04.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.63%

Last modified Jun 17, 2026

CVE-2016-6313 is a vulnerability of currently unknown severity. The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.. EPSS estimates a 3.63% chance of exploitation in the next 30 days.

Description

The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.

Metrics

EPSS Probability

3.63%

88.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Gnupg	Libgcrypt	<= 1.5.3
Gnupg	Libgcrypt	1.6.0
Gnupg	Libgcrypt	1.6.1
Gnupg	Libgcrypt	1.6.2
Gnupg	Libgcrypt	1.6.3
Gnupg	Libgcrypt	1.6.4
Gnupg	Libgcrypt	1.6.5
Gnupg	Libgcrypt	1.7.0
Gnupg	Libgcrypt	1.7.1
Gnupg	Libgcrypt	1.7.2
Debian	Debian Linux	8.0
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Gnupg	Gnupg	<= 1.4.14

References

http://rhn.redhat.com/errata/RHSA-2016-2674.html
http://www.debian.org/security/2016/dsa-3649Third Party Advisory
http://www.debian.org/security/2016/dsa-3650Third Party Advisory
http://www.securityfocus.com/bid/92527Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036635
http://www.ubuntu.com/usn/USN-3064-1Third Party Advisory
http://www.ubuntu.com/usn/USN-3065-1Third Party Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=blob_plain%3Bf=NEWS
https://lists.gnupg.org/pipermail/gnupg-announce/2016q3/000395.htmlMailing List, Vendor Advisory
https://security.gentoo.org/glsa/201610-04
https://security.gentoo.org/glsa/201612-01
http://rhn.redhat.com/errata/RHSA-2016-2674.html
http://www.debian.org/security/2016/dsa-3649Third Party Advisory
http://www.debian.org/security/2016/dsa-3650Third Party Advisory
http://www.securityfocus.com/bid/92527Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036635
http://www.ubuntu.com/usn/USN-3064-1Third Party Advisory
http://www.ubuntu.com/usn/USN-3065-1Third Party Advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=blob_plain%3Bf=NEWS
https://lists.gnupg.org/pipermail/gnupg-announce/2016q3/000395.htmlMailing List, Vendor Advisory
https://security.gentoo.org/glsa/201610-04
https://security.gentoo.org/glsa/201612-01

Timeline

Published: Dec 13, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6313?

How severe is CVE-2016-6313?

Severity scoring for CVE-2016-6313 is pending analysis. The EPSS model estimates a 3.63% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6313?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-6313?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST