Vulnerability identifier: #VU70413

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-0209

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when in the d2i_ECPrivateKey function in crypto/ec/ec_asn1.c. A remote attacker can perform a denial of service (DoS) attack or possibly have unspecified other impact via a malformed Elliptic Curve (EC) private-key file that is improperly handled during import.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSSL: 0.9.8 - 0.9.8ze, 1.0.0 - 1.0.0q, 1.0.1 - 1.0.1l, 1.0.2

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External links
http://www.openssl.org/news/secadv_20150319.txt
http://bugzilla.redhat.com/show_bug.cgi?id=1196737
http://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=1b4a8df38fc9ab3c089ca5765075ee53ec5bd66a
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152844.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152733.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152734.html
http://www.debian.org/security/2015/dsa-3197
http://lists.opensuse.org/opensuse-updates/2015-03/msg00062.html
http://www.freebsd.org/security/advisories/FreeBSD-SA-15%3A06.openssl.asc
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00022.html
http://www.ubuntu.com/usn/USN-2537-1
http://www.securitytracker.com/id/1031929
http://rhn.redhat.com/errata/RHSA-2015-0716.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:063
http://www.mandriva.com/security/advisories?name=MDVSA-2015:062
http://rhn.redhat.com/errata/RHSA-2015-0752.html
http://rhn.redhat.com/errata/RHSA-2015-0715.html
http://marc.info/?l=bugtraq&m=142841429220765&w=2
http://access.redhat.com/articles/1384453
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/156823.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157177.html
http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
http://support.apple.com/kb/HT204942
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
http://bto.bluecoat.com/security-advisory/sa92
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
http://marc.info/?l=bugtraq&m=144050297101809&w=2
http://marc.info/?l=bugtraq&m=144050254401665&w=2
http://marc.info/?l=bugtraq&m=143213830203296&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://rhn.redhat.com/errata/RHSA-2016-1089.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
http://security.gentoo.org/glsa/201503-11
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10680
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
http://kc.mcafee.com/corporate/index?page=content&id=SB10110
http://www.securityfocus.com/bid/73239
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://support.citrix.com/article/CTX216642
http://rhn.redhat.com/errata/RHSA-2016-2957.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.