Vulnerability identifier: #VU19581

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12260

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
VxWorks
Operating systems & Components / Operating system

Vendor: Wind River Systems, Inc.

Description

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

The vulnerability exists due to a boundary error when processing TCP-segments where the last step is a TCP-segment with the URG-flag set due to TCP Urgent Pointer state confusion caused by malformed TCP AO option. A remote attacker can send specially crafted TCP traffic to the affected system, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Vulnerable software versions

VxWorks: 6.9 - 7

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External links
http://ics-cert.us-cert.gov/advisories/icsa-19-211-01
http://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12260
http://support2.windriver.com/index.php?page=security-notices&on=view&id=6652

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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.