CVE-2016-2181 Information

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.

CVSS Vector

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

Reference

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.htmly2017 https://www.tenable.com/security/tns-2016-16 https://www.tenable.com/security/tns-2016-20 https://www.tenable.com/security/tns-2016-21

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5