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.
References
Configurations
Configuration 1 (hide)
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History
22 Oct 2025, 00:16
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| Summary | (es) El subsistema del Protocolo Simple de Administración de Red (SNMP) del software Cisco IOS y IOS XE contiene múltiples vulnerabilidades que podrÃan permitir que un atacante remoto autenticado ejecute código de forma remota en un sistema afectado o provoque su recarga. Un atacante podrÃa explotar estas vulnerabilidades enviando un paquete SNMP manipulado a un sistema afectado mediante IPv4 o IPv6. Solo el tráfico dirigido a un sistema afectado puede utilizarse para explotar estas vulnerabilidades. Las vulnerabilidades se deben a un desbordamiento de búfer en el subsistema SNMP del software afectado. Las vulnerabilidades afectan a todas las versiones de SNMP: versiones 1, 2c y 3. Para explotar estas vulnerabilidades mediante SNMP versión 2c o anterior, el atacante debe conocer la cadena de comunidad de solo lectura de SNMP del sistema afectado. Para explotar estas vulnerabilidades mediante SNMP versión 3, el atacante debe tener las credenciales de usuario del sistema afectado. Un exploit exitoso podrÃa permitir al atacante ejecutar código arbitrario y obtener el control total del sistema afectado o provocar su recarga. Se recomienda a los clientes aplicar la solución alternativa que se describe en la sección "Soluciones alternativas" más adelante. La información sobre el software corregido está disponible a través del verificador de software Cisco IOS. Todos los dispositivos que tengan SNMP habilitado y no hayan excluido explÃcitamente los MIB u OID afectados deben considerarse vulnerables. Existen soluciones alternativas que abordan estas vulnerabilidades. |
31 Jul 2025, 17:15
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| Summary | (en) 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. |
Information
Published : 2017-07-17 21:29
Updated : 2025-10-22 00:16
NVD link : CVE-2017-6744
Mitre link : CVE-2017-6744
CVE.ORG link : CVE-2017-6744
JSON object : View
Products Affected
cisco
- ios
CWE
CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer