My Control System 26.5 – Disk space exhaustion due to incorrect temporary file cleanup after XML conversion

Mitigating factors describe conditions and circumstances that make an attack that exploits the vulnerability difficult or less likely to succeed. Refer to section General security recommendations for further advice on how to keep your system secure. For the reported issue there are no known mitigating factors. Workarounds are specific measures that a user can take to help block an attack, for example, temporarily disabling the vulnerable feature may remove the exposure with well-known impact on functionality. ABB has tested the following workarounds. Although these workarounds will not correct the underlying vulnerability, they can help block known attack vectors. When a workaround reduces functionality, this is identified below as “Impact of workaround”. As a workaround for the reported issue the temporary files could be deleted manually: - Windows environments For Windows environments… The problem is corrected in the following product versions: - My Control System 26.6 (all deployment types) ABB recommends that customers apply the update at earliest convenience. NOTE - Installations of MCS on Edgenius with version 26.5 or earlier are not eligible for an update to MCS 26.6, as this requires an OS upgrade to EdgeniusOS 3.3.0 or later. Support for the required OS upgrade is expected with the upcoming EdgeniusOS 4.0.0 and the corresponding MCS package. Until an upgrade path is available, please follow the workaround in this document. A follow up communication will be…