CVE-2016-9963

Name: CVE-2016-9963
Creator: NVD / NIST
Published: 2017-02-01T15:59:00.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.10%

Last modified Jun 17, 2026

CVE-2016-9963 is a vulnerability of currently unknown severity. Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.. EPSS estimates a 3.10% chance of exploitation in the next 30 days.

Description

Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.

Metrics

EPSS Probability

3.10%

86.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-320

Affected Software

Vendor	Product	Versions
Exim	Exim	<= 4.87
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	16.10
Debian	Debian Linux	8.0

References

http://www.debian.org/security/2016/dsa-3747Third Party Advisory
http://www.exim.org/static/doc/CVE-2016-9963.txtMitigation, Vendor Advisory
http://www.securityfocus.com/bid/94947Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037484Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-3164-1Third Party Advisory
https://bugs.exim.org/show_bug.cgi?id=1996Issue Tracking, Mitigation, Vendor Advisory
http://www.debian.org/security/2016/dsa-3747Third Party Advisory
http://www.exim.org/static/doc/CVE-2016-9963.txtMitigation, Vendor Advisory
http://www.securityfocus.com/bid/94947Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037484Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-3164-1Third Party Advisory
https://bugs.exim.org/show_bug.cgi?id=1996Issue Tracking, Mitigation, Vendor Advisory

Timeline

Published: Feb 1, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9963?

Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.

How severe is CVE-2016-9963?

Severity scoring for CVE-2016-9963 is pending analysis. The EPSS model estimates a 3.10% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9963?

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-2016-9963?

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

Scan your code now

Source: NVD / NIST