PT-2021-2233 · Microchip · Mplab Net
Published
2021-03-05
·
Updated
2023-10-13
·
CVE-2020-27636
CVSS v3.1
9.1
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Name of the Vulnerable Software and Affected Versions
Microchip MPLAB Net version 3.6.1
Description
The issue is related to the improper randomness of TCP Initial Sequence Numbers (ISNs) in the implementation of the MPLAB Net protocol stack. This could allow a remote attacker to gain unauthorized access to protected information. The estimated number of potentially affected devices worldwide is not specified.
Recommendations
For Microchip MPLAB Net version 3.6.1, consider restricting access to the network until a patch or fix is available to properly randomize TCP ISNs. As a temporary workaround, limiting the exposure of the system to untrusted networks may help minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Use of Insufficiently Random Values
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Weakness Enumeration
Related Identifiers
Affected Products
Mplab Net