Vulnerability CVE-2018-7790
Published: 2018-08-29

Description:
An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to replay authentication sequences. If an attacker exploits this vulnerability and connects to a Modicon M221, the attacker can upload the original program from the PLC.

Type:

CWE-294

 (Authentication Bypass by Capture-replay)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Schneider-electric -> Modicon m221 firmware 

 References:
http://www.securityfocus.com/bid/105182
https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/
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