CVE-2016-6305

Public Exploit

Description

The ssl3_read_bytes function in record/rec_layer_s3.c in OpenSSL 1.1.0 before 1.1.0a allows remote attackers to cause a denial of service (infinite loop) by triggering a zero-length record in an SSL_peek call.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 36.69% Top 5%
Vendor Advisory gentoo.org Vendor Advisory openssl.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.openssl.org/news/secadv/20160922.txt vendor advisory
https://www.tenable.com/security/tns-2016-20
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.securitytracker.com/id/1036879 vdb entry
https://security.gentoo.org/glsa/201612-16 vendor advisory
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=63658103d4441924f8dbfc517b99bb54758a98b9
http://www-01.ibm.com/support/docview.wss?uid=swg21995039
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
https://www.tenable.com/security/tns-2016-16
https://www.tenable.com/security/tns-2016-21
http://www.securityfocus.com/bid/93149 vdb entry
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
https://github.com/openssl/openssl/issues/1563 issue tracking exploit
https://bto.bluecoat.com/security-advisory/sa132
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Frequently Asked Questions

What is the severity of CVE-2016-6305?
CVE-2016-6305 has been scored as a high severity vulnerability.
How to fix CVE-2016-6305?
To fix CVE-2016-6305, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-6305 being actively exploited in the wild?
It is possible that CVE-2016-6305 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~37% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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