CVE-2015-1788

MEDIUM

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.

References

http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery

http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015

http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694

http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html

http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html

http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html

http://marc.info/?l=bugtraq&m=143880121627664&w=2

http://marc.info/?l=bugtraq&m=144050155601375&w=2

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150612-openssl

http://www-304.ibm.com/support/docview.wss?uid=swg21960041

http://www.debian.org/security/2015/dsa-3287

http://www.fortiguard.com/advisory/2015-06-11-fortinet-vulnerability-openssl-vulnerabilities-june-2015

http://www.fortiguard.com/advisory/openssl-vulnerabilities-june-2015

http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html

http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html

http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html

http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html

http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html

http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html

http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html

http://www.securityfocus.com/bid/75158

http://www.securityfocus.com/bid/91787

http://www.securitytracker.com/id/1032564

http://www.ubuntu.com/usn/USN-2639-1

https://bto.bluecoat.com/security-advisory/sa98

https://github.com/openssl/openssl/commit/4924b37ee01f71ae19c94a8934b80eeb2f677932

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05131044

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351

https://kc.mcafee.com/corporate/index?page=content&id=SB10122

https://openssl.org/news/secadv/20150611.txt

https://security.gentoo.org/glsa/201506-02

https://support.apple.com/kb/HT205031

https://support.citrix.com/article/CTX216642

https://www.openssl.org/news/secadv_20150611.txt

Details

Source: MITRE

Published: 2015-06-12

Updated: 2017-11-15

Type: CWE-399

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P)

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM