#VU29092 Input validation error in TCP/IP stack - CVE-2020-11899

Vulnerability identifier: #VU29092

Vulnerability risk: Low

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

CVE-ID: CVE-2020-11899

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
TCP/IP stack
Other software / Other software solutions

Vendor: Placeful Inc.

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in IPv6 component. A remote attacker on the local network can pass specially crafted packet, trigger out-of-bounds read and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TCP/IP stack: before 6.0.1.66

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External links
https://ics-cert.us-cert.gov/advisories/icsa-20-168-01
https://treck.com/vulnerability-response-information/
https://kb.cert.org/vuls/id/257161

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.