CVE-2016-6309: Use After Free
First published: Mon Sep 26 2016(Updated: )
statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSL libcrypto | =1.1.0a |
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Reference Links
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- 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.securityfocus.com/bid/93177
- http://www.securitytracker.com/id/1036885
- https://bto.bluecoat.com/security-advisory/sa132
- https://git.openssl.org/?p=openssl.git;a=commit;h=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
- https://www.openssl.org/news/secadv/20160926.txt
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-20
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
Frequently Asked Questions
What is the severity of CVE-2016-6309?
CVE-2016-6309 is considered a high severity vulnerability due to its potential to cause denial of service and execute arbitrary code.
How do I fix CVE-2016-6309?
To fix CVE-2016-6309, you should upgrade OpenSSL to a version later than 1.1.0a where this vulnerability has been addressed.
What type of attack does CVE-2016-6309 enable?
CVE-2016-6309 allows remote attackers to exploit a use-after-free vulnerability, leading to denial of service or arbitrary code execution.
What versions of OpenSSL are affected by CVE-2016-6309?
CVE-2016-6309 specifically affects OpenSSL version 1.1.0a.
Can CVE-2016-6309 affect my application's security?
Yes, CVE-2016-6309 can compromise your application's security by allowing attackers to exploit the vulnerability during TLS sessions.
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