CVE-2016-10196

Name: CVE-2016-10196
Creator: NVD / NIST
Published: 2017-03-15T15:59:00.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 5.21%

Last modified Jun 17, 2026

CVE-2016-10196 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Stack-based buffer overflow in the evutil_parse_sockaddr_port function in evutil.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (segmentation fault) via vectors involving a long string in brackets in the ip_as_string argument.. EPSS estimates a 5.21% chance of exploitation in the next 30 days.

Description

Stack-based buffer overflow in the evutil_parse_sockaddr_port function in evutil.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (segmentation fault) via vectors involving a long string in brackets in the ip_as_string argument.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

5.21%

91.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	8.0
Libevent Project	Libevent	<= 2.1.5
Mozilla	Firefox	< 45.9.0
Mozilla	Firefox	< 53.0
Mozilla	Firefox	52.0
Mozilla	Thunderbird	< 52.1.0

References

http://www.debian.org/security/2017/dsa-3789Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/01/31/17Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/02/7Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/96014Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038320Broken Link, Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1104Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1106Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1201Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1343453Issue Tracking, Third Party Advisory
https://github.com/libevent/libevent/blob/release-2.1.6-beta/ChangeLogRelease Notes, Third Party Advisory
https://github.com/libevent/libevent/commit/329acc18a0768c21ba22522f01a5c7f46cacc4d5Patch, Third Party Advisory
https://github.com/libevent/libevent/issues/318Exploit, Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/201705-01Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-10/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-11/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-12/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-13/Third Party Advisory
http://www.debian.org/security/2017/dsa-3789Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/01/31/17Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/02/7Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/96014Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038320Broken Link, Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1104Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1106Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1201Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1343453Issue Tracking, Third Party Advisory
https://github.com/libevent/libevent/blob/release-2.1.6-beta/ChangeLogRelease Notes, Third Party Advisory
https://github.com/libevent/libevent/commit/329acc18a0768c21ba22522f01a5c7f46cacc4d5Patch, Third Party Advisory
https://github.com/libevent/libevent/issues/318Exploit, Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/201705-01Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-10/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-11/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-12/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-13/Third Party Advisory

Timeline

Published: Mar 15, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-10196?

How severe is CVE-2016-10196?

CVE-2016-10196 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.21% probability of exploitation in the next 30 days.

How do I fix CVE-2016-10196?

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-2016-10196?

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

Scan your code now

Source: NVD / NIST