#VU19584 Input validation error in VxWorks - CVE-2019-12258

Vulnerability identifier: #VU19584

Vulnerability risk: Low

CVSSv4.0: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:A/U:Clear]

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

---

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-2019-12258

---

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.