CVE-2020-12494— Beckhoff TwinCAT RT 信息泄露漏洞

Beckhoff: Etherleak in TwinCAT RT network driver

Beckhoff's TwinCAT RT network driver for Intel 8254x and 8255x is providing EtherCAT functionality. The driver implements real-time features. Except for Ethernet frames sent from real-time functionality, all other Ethernet frames sent through the driver are not padded if their payload is less than the minimum Ethernet frame size. Instead, arbitrary memory content is transmitted within in the padding bytes of the frame. Most likely this memory contains slices from previously transmitted or received frames. By this method, memory content is disclosed, however, an attacker can hardly control which memory content is affected. For example, the disclosure can be provoked with small sized ICMP echo requests sent to the device.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

清理环节不完整

Beckhoff TwinCAT RT 信息泄露漏洞

Beckhoff TwinCAT RT是德国Beckhoff公司的一款TwinCAT以太网卡驱动程序。 Beckhoff TwinCAT RT（Intel 8254x和8255x）中存在信息泄露漏洞。该漏洞源于网络系统或产品在运行过程中存在配置等错误。未授权的攻击者可利用漏洞获取受影响组件敏感信息。

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