#VU21935 Stack-based buffer overflow in IEC870IP - CVE-2019-13537

Vulnerability identifier: #VU21935

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-2019-13537

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
IEC870IP
Hardware solutions / Drivers

Vendor: AVEVA Software, LLC.

Description

The vulnerability allows a remote attacker to cause a server-side crash.

The vulnerability exists due to a boundary error in the IEC870IP driver. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause a server-side crash on the target system.

Note: This vulnerability affects only the IEC870IP driver used in Vijeo Citect and Citect SCADA.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

IEC870IP: 4.14.02

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External links
https://ics-cert.us-cert.gov/advisories/icsa-19-290-01
https://sw.aveva.com/hubfs/assets-2018/pdf/security-bulletin/SecurityBulletin_LFSec139.pdf

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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.