CVE-2019-6553: A vulnerability was found in Rockwell Automation RSLinx Classic versions 4.10.00 and prior. An input validation issue in a .dll file of RSLinx Classic where…

PriorityP270critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

50.03%

98.8th percentile

A vulnerability was found in Rockwell Automation RSLinx Classic versions 4.10.00 and prior. An input validation issue in a .dll file of RSLinx Classic where the data in a Forward Open service request is passed to a fixed size buffer, allowing an attacker to exploit a stack-based buffer overflow condition.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
rockwell_automation	rslinx_classic	—	—
rockwellautomation	rslinx	<= 4.10.00	—

Detection & IOCsextracted from sources · hover to see the quote

port44818↗

→Monitor for malformed Forward Open service requests sent to UDP port 44818, which is the attack vector for the stack-based buffer overflow in RSLinx Classic's .dll file. ↗

·No known public exploits specifically target this vulnerability at time of advisory publication. ↗

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

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