CVE-2016-2181

MEDIUM

Description

The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759

http://rhn.redhat.com/errata/RHSA-2016-1940.html

http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html

http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html

http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html

http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html

http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html

http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html

http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html

http://www.securityfocus.com/bid/92982

http://www.securitytracker.com/id/1036690

http://www.splunk.com/view/SP-CAAAPSV

http://www.splunk.com/view/SP-CAAAPUE

http://www-01.ibm.com/support/docview.wss?uid=swg21995039

https://bto.bluecoat.com/security-advisory/sa132

https://git.openssl.org/?p=openssl.git;a=commit;h=1fb9fdc3027b27d8eb6a1e6a846435b070980770

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312

https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc

https://www.openssl.org/news/vulnerabilities.html#y2017

https://www.tenable.com/security/tns-2016-16

https://www.tenable.com/security/tns-2016-20

https://www.tenable.com/security/tns-2016-21

Details

Source: MITRE

Published: 2016-09-16

Updated: 2018-04-20

Type: CWE-189

Risk Information

CVSS v2.0

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH