Vulnerability identifier: #VU19584

Vulnerability risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:F/RL:O/RC:C]

CVE-ID: CVE-2019-12258

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
VxWorks
Operating systems & Components / Operating system

Vendor: Wind River Systems, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation when processing options in TCP packets. A remote attacker can a specially crafted TCP packet with the source and destination TCP-port and IP-addresses of an existing session can reset the TCP session, leading to a DoS attack.

Mitigation

Vulnerable software versions

VxWorks: 6.6 - 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-2019-12258

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.