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A vulnerability in Cisco IOS Software for Cisco Catalyst 2960X, 2960XR, 2960CX, and 3560CX Series Switches could allow an authenticated, local attacker with privilege level 15 or an unauthenticated attacker with physical access to the device to execute persistent code at boot time and break the chain of trust. This vulnerability is due to missing signature verification for specific files that may be loaded during the device boot process. An attacker could exploit this vulnerability by placing a crafted file into a specific location on an affected device. A successful exploit could allow the attacker to execute arbitrary code at boot time. Because this allows the attacker to bypass a major security feature of the device, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.

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密码学签名的验证不恰当

Cisco IOS 数据伪造问题漏洞

Cisco IOS是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS存在数据伪造问题漏洞，该漏洞源于缺少签名验证，可能导致执行任意代码。

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