#VU19583 Race condition in VxWorks - CVE-2019-12263

Vulnerability identifier: #VU19583

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-12263

CWE-ID: CWE-362

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 perform denial of service (DoS) attack.

The vulnerability exists due to a race condition when processing TCP packets. A remote unauthenticated attacker can send malicious sequence of TCP packets within a specific timing, trigger a race condition and perform denial of service attack.

Mitigation

Vulnerable software versions

VxWorks: 6.6 - 7

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External links
https://ics-cert.us-cert.gov/advisories/icsa-19-211-01
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12263
https://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.