#VU24473 Deserialization of Untrusted Data in MAXPRO VMS and MAXPRO NVR - CVE-2020-6959

Vulnerability identifier: #VU24473

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-6959

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MAXPRO VMS
Server applications / Conferencing, Collaboration and VoIP solutions
MAXPRO NVR
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Honeywell International, Inc

Description

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

The vulnerability exists due to insecure input validation when processing serialized data. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

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

This vulnerability affects the following versions of MAXPRO VMS and NVR:

MAXPRO VMS:

• HNMSWVMS prior to Version VMS560 Build 595 T2-Patch
• HNMSWVMSLT prior to Version VMS560 Build 595 T2-Patch

MAXPRO NVR:

• MAXPRO NVR XE prior to Version NVR 5.6 Build 595 T2-Patch
• MAXPRO NVR SE prior to Version NVR 5.6 Build 595 T2-Patch
• MAXPRO NVR PE prior to Version NVR 5.6 Build 595 T2-Patch
• MPNVRSWXX prior to Version NVR 5.6 Build 595 T2-Patch

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MAXPRO VMS: before VMS560 Build 595 T2-Patch

MAXPRO NVR: before NVR 5.6 Build 595 T2-Patch

---

External links
https://ics-cert.us-cert.gov/advisories/icsa-20-021-01

---

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.