Improper Input Validation Affecting openssl package, versions <1.0.2g-1ubuntu4.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Improper Input Validation vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UBUNTU1604-OPENSSL-374632
- published16 Sept 2016
- disclosed16 Sept 2016
Introduced: 16 Sep 2016
CVE-2016-6302 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 openssl to version 1.0.2g-1ubuntu4.4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of service via a ticket that is too short.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-6302
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- https://bto.bluecoat.com/security-advisory/sa132
- https://git.openssl.org/?p=openssl.git;a=commit;h=e97763c92c655dcf4af2860b3abd2bc4c8a267f9
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-20
- https://www.tenable.com/security/tns-2016-21
- http://www.splunk.com/view/SP-CAAAPSV
- http://www.splunk.com/view/SP-CAAAPUE
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6302
- https://security-tracker.debian.org/tracker/CVE-2016-6302
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- https://www.openssl.org/news/vulnerabilities.html#y2017
- 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/bulletinoct2016-3090566.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- http://rhn.redhat.com/errata/RHSA-2016-1940.html
- https://access.redhat.com/errata/RHSA-2018:2185
- https://access.redhat.com/errata/RHSA-2018:2186
- https://access.redhat.com/errata/RHSA-2018:2187
- http://www.securityfocus.com/bid/92628
- http://www.securitytracker.com/id/1036885
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=e97763c92c655dcf4af2860b3abd2bc4c8a267f9