CVE-2015-1788

Description

The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial field, which allows remote attackers to cause a denial of service (infinite loop) via a session that uses an Elliptic Curve algorithm, as demonstrated by an attack against a server that supports client authentication.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 20.42% Top 5%
Vendor Advisory opensuse.org Vendor Advisory marc.info Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory marc.info 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 apple.com Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory netbsd.org Vendor Advisory openssl.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html vendor advisory
http://marc.info/?l=bugtraq&m=143880121627664&w=2 vendor advisory
http://www.debian.org/security/2015/dsa-3287 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html vendor advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10122
http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015
http://marc.info/?l=bugtraq&m=144050155601375&w=2 vendor advisory
http://www.securityfocus.com/bid/75158 vdb entry
https://openssl.org/news/secadv/20150611.txt
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html vendor advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://www.securitytracker.com/id/1032564 vdb entry
http://www-304.ibm.com/support/docview.wss?uid=swg21960041
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
http://www.fortiguard.com/advisory/2015-06-11-fortinet-vulnerability-openssl-vulnerabilities-june-2015
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150612-openssl vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html vendor advisory
https://github.com/openssl/openssl/commit/4924b37ee01f71ae19c94a8934b80eeb2f677932
http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html vendor advisory
http://www.ubuntu.com/usn/USN-2639-1 vendor advisory
http://www.fortiguard.com/advisory/openssl-vulnerabilities-june-2015
https://security.gentoo.org/glsa/201506-02 vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05131044
http://www.securityfocus.com/bid/91787 vdb entry
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763
https://support.apple.com/kb/HT205031
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
https://support.citrix.com/article/CTX216642
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html vendor advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html vendor advisory
https://bto.bluecoat.com/security-advisory/sa98
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc vendor advisory
https://www.openssl.org/news/secadv_20150611.txt vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Frequently Asked Questions

What is the severity of CVE-2015-1788?
CVE-2015-1788 has been scored as a medium severity vulnerability.
How to fix CVE-2015-1788?
To fix CVE-2015-1788, 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-2015-1788 being actively exploited in the wild?
It is possible that CVE-2015-1788 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~20% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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