PT-2017-2511 · Cisco · Cisco Ios Xe+1

Published

2017-06-29

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Updated

2025-07-31

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CVE-2017-6739

CVSS v2.0

9.0

High

VectorAV:N/AC:L/Au:S/C:C/I:C/A:C
Name of the Vulnerable Software and Affected Versions Cisco IOS versions 12.0 through 12.4 and 15.0 through 15.6 Cisco IOS XE versions 2.2 through 3.17
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. 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.
Recommendations For Cisco IOS versions 12.0 through 12.4 and 15.0 through 15.6, apply the software updates released by Cisco that address these vulnerabilities. For Cisco IOS XE versions 2.2 through 3.17, apply the software updates released by Cisco that address these vulnerabilities. As a temporary workaround, consider disabling the SNMP subsystem until a patch is available. Restrict access to the affected MIBs or OIDs to minimize the risk of exploitation. Avoid using the SNMP read-only community string for the affected system until the issue is resolved. Use the Cisco IOS Software Checker to obtain fixed software information.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2017-01721
CVE-2017-6739

Affected Products

Cisco Ios
Cisco Ios Xe