#VU660 Missing CRL sanity check in OpenSSL and Oracle VM VirtualBox - CVE-2016-7052

Vulnerability identifier: #VU660

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-7052

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software
Oracle VM VirtualBox
Server applications / Virtualization software

Vendor: OpenSSL Software Foundation
Oracle

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to incorrect implementation of CRL sanity check in version 1.0.2i. Any attempt to use CRLs results in null pointe exception and crashes the process.

Mitigation

Update to version 1.0.2j.

Vulnerable software versions

OpenSSL: 1.0.2i

Oracle VM VirtualBox: 5.0.27, 5.1.7

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External links
https://www.openssl.org/news/secadv/20160926.txt
https://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.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.