Vulnerability identifier: #VU4173

Vulnerability risk: Critical

CVSSv3.1: 9.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2012-1723

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Oracle Java SE
Universal components / Libraries / Software for developers

Vendor: Oracle

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to an error in the HotSpot bytecode verifier. By using untrusted Java Web Start applications and untrusted Java applets in a client deployment, a remote attacker can execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation
Install update from vendor's website:
http://www.oracle.com/technetwork/topics/security/alerts-086861.html

Vulnerable software versions

Oracle Java SE: 5 Update 35, 6u32, 7u4

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External links
http://www.oracle.com/technetwork/topics/security/javacpujun2012-1515912.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?

Yes. This vulnerability is being exploited in the wild.