#VU44142 Type Confusion in OpenJ9 - CVE-2019-17639

Vulnerability identifier: #VU44142

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-17639

CWE-ID: CWE-843

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenJ9
Server applications / Virtualization software

Vendor: Eclipse

Description

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

The vulnerability exists due to a type confusion error on Power platforms. A remote attacker can call the System.arraycopy method with a length longer than the length of the source or destination array and cause the current method to return prematurely with an undefined return value. As a result, a remote attacker can influence application flow and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenJ9: 0.0M1 - 0.21.0-m2

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External links
https://bugs.eclipse.org/bugs/show_bug.cgi?id=563998

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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.