VulnerabilityModified
CVE-2016-6302
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.
HIGH 7.5EPSS 27.8%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 27.8%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 27.81% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- openssl/openssl · oracle/linux · oracle/solaris
- Source
- secalert@redhat.com
References
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1940.html
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039Third Party Advisory
- 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.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/92628Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036885
- http://www.splunk.com/view/SP-CAAAPSVThird Party Advisory
- http://www.splunk.com/view/SP-CAAAPUEThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2185
- https://access.redhat.com/errata/RHSA-2018:2186
- https://access.redhat.com/errata/RHSA-2018:2187
- https://bto.bluecoat.com/security-advisory/sa132Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=e97763c92c655dcf4af2860b3abd2bc4c8a267f9
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312Third Party Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc
- https://www.tenable.com/security/tns-2016-16Third Party Advisory
- https://www.tenable.com/security/tns-2016-20
- https://www.tenable.com/security/tns-2016-21
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1940.html
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.