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CVE-2017-6736

Quick assessment

Affected
Cisco IOS
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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子系统中存在安全漏洞。远程攻击者可通过向受影响系统发送特制的SNMP数据包利用该漏洞在受影响的系统上执行任意代码或造成系统重启。以下版本

AI Predicted 8.1 Difficulty: Easy KEV EPSS 70.35% · P99

Public Exploits 1

ExploitDB · 1 EDB-43450 [remote]
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I. Basic Information for CVE-2017-6736

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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子系统中存在安全漏洞。远程攻击者可通过向受影响系统发送特制的SNMP数据包利用该漏洞在受影响的系统上执行任意代码或造成系统重启。以下版本
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco IOS 12.1(3a)XI9 -
IntelliShield Universal Product N/A -

II. Public POCs for CVE-2017-6736

# POC Description Source Link Shenlong Link
1 A POC chain exploit using the recent Cisco SMP exploit (CVE-2017-6736) to chain into Spectre (CVE-2017-5753 and CVE-2017-5715) https://github.com/GarnetSunset/CiscoSpectreTakeover POC Details
2 Cisco iOS SNMP Overflow Exploit Toolkit (CVE-2017-6736) https://github.com/GarnetSunset/CiscoIOSSNMPToolkit POC Details
3 A POC chain exploit using the recent Cisco SMP exploit (CVE-2017-6736) to chain into Spectre (CVE-2017-5753 and CVE-2017-5715) https://github.com/garnetsunset/CiscoSpectreTakeover POC Details
4 Cisco iOS SNMP Overflow Exploit Toolkit (CVE-2017-6736) https://github.com/garnetsunset/CiscoIOSSNMPToolkit POC Details
5 A POC chain exploit using the recent Cisco SMP exploit (CVE-2017-6736) to chain into Spectre (CVE-2017-5753 and CVE-2017-5715) https://github.com/plyrthn/CiscoSpectreTakeover POC Details
6 Cisco iOS SNMP Overflow Exploit Toolkit (CVE-2017-6736) https://github.com/plyrthn/CiscoIOSSNMPToolkit POC Details
7 Cisco iOS SNMP Overflow Exploit Toolkit (CVE-2017-6736) https://github.com/msztankowski/CiscoIOSSNMPToolkit POC Details
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III. Intelligence Information for CVE-2017-6736

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Vendor Advisories for CVE-2017-6736 (4)

Exploits & Public PoCs for CVE-2017-6736 (1)

Other References for CVE-2017-6736 (1)

Same Patch Batch · Cisco · 2017-07-17 · 8 CVEs total

CVE-2017-6737 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
CVE-2017-6738 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
CVE-2017-6740 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
CVE-2017-6741 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
CVE-2017-6742 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
CVE-2017-6743 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞
CVE-2017-6744 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: IOS
Same vendor: Cisco
Same weakness: CWE-119

V. Comments for CVE-2017-6736

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