Description
The MMS BER decoder contains a boundary-handling flaw in the processing of certain fields within confirmed-request messages. When a crafted BER-encoded element is received over an established MMS session (TCP port 102), the decoder may advance its internal read position incorrectly, leading to a heap out-of-bounds read. This condition causes the MMS handling process to terminate unexpectedly, resulting in a denial-of-service.
Scores
CVSS v3
6.5
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (2)
MZ Automation GmbH/libiec61850
< 1.6.2
MZ Automation GmbH/libiec61850
1.6.2
Published
Jul 30, 2026
Tracked Since
Jul 31, 2026