ID

VAR-201707-0958

CVE

CVE-2017-6739

TITLE

Cisco IOS and IOS XE of SNMP Subsystem vulnerable to remote code execution on affected systems

DESCRIPTION

A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability. Cisco IOS and IOS XE Software are prone to multiple remote code-execution vulnerabilities. These issues are being tracked by Cisco Bug IDs-CSCve54313,CSCve57697,CSCve60276,CSCve60376,CSCve60402,CSCve60507,CSCve66540,CSCve66601,CSCve66658,CSCve78027,CSCve89865. Simple Network Management Protocol (SNMP) subsystem is one of the simple network management subsystems used for network device management information exchange. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

buffer error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, or otherwise using such software upgrades, accessing, or all advisories in the most recent bundled publication To determine whether a release is affected by any published Cisco Security Advisory, which are available from the Cisco Security Advisories and Alerts page, a specific advisory, that identifies any Cisco Security Advisories that impact a specific software release and the earliest release that fixes the vulnerabilities described in each advisory (“First Fixed”). If applicable, customers may only download software for which they have a valid license, additional software feature sets, customers are advised to regularly consult the advisories for Cisco products, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified (“Combined First Fixed”). Customers can use this tool to perform the following tasks: Initiate a search by choosing one or more releases from a drop-down menu or uploading a file from a local system for the tool to parse Enter the output of the show version command for the tool to parse Create a custom search by including all previously published Cisco Security Advisories, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, the Cisco?IOS Software Checker, refer to the Cisco?IOS XE 2 Release Notes, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Cisco?IOS and IOS?XE Software To help customers determine their exposure to vulnerabilities in Cisco?IOS and IOS?XE Software, depending on the Cisco?IOS?XE Software release., Cisco?IOS XE 3S Release Notes, or Cisco?IOS XE 3SG Release Notes, Cisco provides a tool, use the Cisco?IOS Software Checker on Cisco.com or enter a Cisco?IOS Software or Cisco?IOS?XE Software release—for example, or major revision upgrades. When considering software upgrades, 15.1(4)M2 or 3.1.4S—in the following field: For a mapping of Cisco?IOS XE Software releases to Cisco?IOS Software releases, to determine exposure and a complete upgrade solution. In all cases, procured from Cisco directly, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, downloading, customers agree to follow the terms of the Cisco software license: http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html Additionally

SOURCES

LAST UPDATE DATE

2025-08-01T23:00:10.790000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE