CVE-2017-6740— Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞

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The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities. The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP - Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. A successful exploit could allow the attacker to execute arbitrary code and obtain full control of the affected system or cause the affected system to reload. Customers are advised to apply the workaround as contained in the Workarounds section below. Fixed software information is available via the Cisco IOS Software Checker. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. There are workarounds that address these vulnerabilities.

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内存缓冲区边界内操作的限制不恰当

Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞

Cisco IOS和IOS XE都是美国思科（Cisco）公司为其网络设备开发的操作系统。Simple Network Management Protocol（SNMP）subsystem是其中的一个用于网络设备管理信息交换的简单网络管理子系统。 Cisco IOS 12.0版本至12.4版本、15.0版本至15.6版本和IOS XE 2.2版本至3.17版本中的SNMP子系统存在缓冲区溢出漏洞。远程攻击者可通过向受影响的系统发送特制的SNMP数据包利用该漏洞在受影响的系统上执行任意代码。以下版本受到影响

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