VulnerabilityModified
CVE-2016-6309
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.
CRITICAL 9.8EPSS 70.2%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 70.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 70.22% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- openssl/openssl
- Source
- secalert@redhat.com
References
- 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%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
- https://www.openssl.org/news/secadv/20160926.txtVendor Advisory
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-20
- 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%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
- https://www.openssl.org/news/secadv/20160926.txtVendor Advisory
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-20
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.