#VU56001 NULL pointer dereference in AVEVA Software, LLC. products - CVE-2021-32971

Vulnerability identifier: #VU56001

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-32971

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
AVEVA System Platform
Server applications / SCADA systems
AVEVA InTouch
Server applications / Other server solutions
AVEVA Historian
Server applications / Other server solutions
AVEVA Communication Drivers Pack
Server applications / Other server solutions
AVEVA Operations Integration Core
Server applications / Other server solutions
AVEVA Data Acquisition Servers
Server applications / Other server solutions
AVEVA Batch Management
Server applications / Other server solutions
AVEVA MES
Server applications / Other server solutions
AVEVA SuiteLink Server
Server applications / Other server solutions

Vendor: AVEVA Software, LLC.

Description

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

The vulnerability exists due to a NULL pointer dereference error in SuiteLink server while processing command 0x07. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

AVEVA System Platform: 2020 R2 P01

AVEVA InTouch: 2020 R2 P01

AVEVA Historian: 2020 R2 P01

AVEVA Communication Drivers Pack: 2020 R2

AVEVA Operations Integration Core: 3.0

AVEVA Data Acquisition Servers: All versions

AVEVA Batch Management: 2020

AVEVA MES: 2014 R2

AVEVA SuiteLink Server: before 3.2.002

---

External links
https://ics-cert.us-cert.gov/advisories/icsa-21-231-01
https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AV...

---

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.