CVE-2016-2109

Description

The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (memory consumption) via a short invalid encoding.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 57.94% Top 5%
Vendor Advisory slackware.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory cisco.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory apple.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory freebsd.org Vendor Advisory openssl.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.542103 vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-2056.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00014.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00018.html vendor advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00029.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-2073.html vendor advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03765en_us
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.debian.org/security/2016/dsa-3566 vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://packetstormsecurity.com/files/136912/Slackware-Security-Advisory-openssl-Updates.html
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
https://kc.mcafee.com/corporate/index?page=content&id=SB10160
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00019.html vendor advisory
https://source.android.com/security/bulletin/2017-07-01
https://security.gentoo.org/glsa/201612-16 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00008.html vendor advisory
http://www.securitytracker.com/id/1035721 vdb entry
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00001.html vendor advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160504-openssl vendor advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00010.html vendor advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03756en_us
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00016.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00017.html vendor advisory
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00055.html vendor advisory
https://www.tenable.com/security/tns-2016-18
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00011.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00013.html vendor advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40202
http://rhn.redhat.com/errata/RHSA-2016-0996.html vendor advisory
https://security.netapp.com/advisory/ntap-20160504-0001/
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=c62981390d6cf9e3d612c489b8b77c2913b25807
http://www.securityfocus.com/bid/91787 vdb entry
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00036.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00030.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-2957.html vendor advisory
http://www.ubuntu.com/usn/USN-2959-1 vendor advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.securityfocus.com/bid/87940 vdb entry
http://rhn.redhat.com/errata/RHSA-2016-0722.html vendor advisory
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:17.openssl.asc vendor advisory
https://www.openssl.org/news/secadv/20160503.txt vendor advisory
https://support.apple.com/HT206903
https://bto.bluecoat.com/security-advisory/sa123
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-2016-2109?
CVE-2016-2109 has been scored as a high severity vulnerability.
How to fix CVE-2016-2109?
To fix CVE-2016-2109, 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-2016-2109 being actively exploited in the wild?
It is possible that CVE-2016-2109 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~58% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.