![]() In addition, we have addressed issue 1 for Bitvise SSH Server 6.xx versions due to the high severity impact on 32-bit versions of Windows.Īt this time, the limited impact does not seem to warrant applying this change to 6.xx versions of Bitvise SSH Client and FlowSsh. We have addressed issue 1 in Bitvise SSH Server, Client, and FlowSsh versions 7.41 and higher. FlowSsh 5.xx and 7.xx, but not version 7.41 and future versions.Bitvise SSH Client 6.xx and 7.xx, but not versions 7.41 and higher.Bitvise SSH Server 7.xx, but not versions 7.41 and higher.Bitvise SSH Server 6.xx, but not version 6.51 and future versions.The following versions of our software are affected by issue 1: The severity of this impact depends on the characteristics of the application.Īt this time, we believe applications using the 64-bit version of FlowSsh are unaffected. If an application using the 32-bit version of FlowSsh connects to a server which sends a specially crafted packet that should cause FlowSsh to disconnect, the application will instead stop abruptly. In addition, this issue has the following impact on applications using FlowSsh: Due to the limited effects, this would not be an interesting attack in most usage scenarios. Low severity: If a user or administrator imports a specially crafted file when using either the local Bitvise SSH Server Control Panel the remote Bitvise SSH Server Control Panel or Bitvise SSH Client then the process being used to import the file can stop abruptly. Lower severity: A server to which a user connects using Bitvise SSH Client can cause the SSH Client to stop abruptly. For example, an error might be logged instead of the last actions taken by the user. This can have an effect on what actions are logged. Lower severity: An authenticated user connected to Bitvise SSH Server who is permitted to use the SFTP subsystem can cause the SFTP subsystem to stop abruptly. The following other impacts are present on all versions of Windows. This high severity impact is not present on 64-bit versions of Windows. High severity: When an affected Bitvise SSH Server version is installed on a 32-bit version of Windows, a remote unauthenticated attacker can cause the SSH Server's main service to stop abruptly. This issue has the following impact on Bitvise SSH Server and Client: At this time, we believe this memory access is always invalid and cannot be used for remote code execution. This issue consists of an invalid memory access. An initialization issue in a compression library used by Bitvise software.A security issue in common functionality used by Bitvise software.We have been informed of, and have taken steps to address: If you rely on this feature, upgrades to new SSH Server feature releases require adjustments to scripts. The main outlier in ease of upgrading is the SSH Server's scriptable configuration language. If an upgrade causes you trouble, let us know. It is one of our top priorities that users should experience as few problems as possible when updating to the latest versions of our software. We recommend all users to use Bitvise software versions not older than one year, or newer in case of recent security fixes. These versions will not receive updates, whereas the most recent versions will. These versions contain known issues which are resolved in newer releases. You are viewing version history for outdated Bitvise software versions. Support for these software versions has ended: Bitvise SSH Server 7.xx Version History Bitvise SSH Server 6.xx Version History
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