Buffer overflow in OpenSSL

1) Buffer overflow

EUVDB-ID: #VU40720

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-2014-8176

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The dtls1_clear_queues function in ssl/d1_lib.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h frees data structures without considering that application data can arrive between a ChangeCipherSpec message and a Finished message, which allows remote DTLS peers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via unexpected application data.

Mitigation

Install update from vendor's website.

Vulnerable software versions

OpenSSL: 1.0.0 - 1.0.1g

External links

http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
http://rhn.redhat.com/errata/RHSA-2015-1115.html
http://rhn.redhat.com/errata/RHSA-2016-2957.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150612-openssl
http://www.debian.org/security/2015/dsa-3287
http://www.fortiguard.com/advisory/openssl-vulnerabilities-june-2015
http://www.securityfocus.com/bid/75159
http://www.securitytracker.com/id/1032564
http://www.ubuntu.com/usn/USN-2639-1
http://bto.bluecoat.com/security-advisory/sa98
http://github.com/openssl/openssl/commit/470990fee0182566d439ef7e82d1abf18b7085d7
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351
http://kc.mcafee.com/corporate/index?page=content&id=SB10122
http://openssl.org/news/secadv/20150611.txt
http://rt.openssl.org/Ticket/Display.html?id=3286&user=guest&pass=guest
http://security.gentoo.org/glsa/201506-02
http://www.openssl.org/news/secadv_20150611.txt

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.