Exploited
critical
9
CWE
119
Advisory Published
Updated

CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

First published: Mon Jul 17 2017(Updated: )

The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS 12.0 through 12.4 and 15.0 through 15.6 and IOS XE 2.2 through 3.17 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. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. Cisco Bug IDs: CSCve54313.

Credit: psirt@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS XE Software
Cisco IOS>=12.0<=12.4
Cisco IOS>=15.0<=15.6
Cisco IOS XE>=2.2.0<=3.17
Cisco IOS XE=2.2.0
Cisco IOS XE=2.2.1
Cisco IOS XE=2.2.2
Cisco IOS XE=2.2.3
Cisco IOS XE=2.3.0
Cisco IOS XE=2.3.1
Cisco IOS XE=2.3.1t
Cisco IOS XE=2.3.2
Cisco IOS XE=2.4.0
Cisco IOS XE=2.4.1
Cisco IOS XE=2.4.2
Cisco IOS XE=2.4.3
Cisco IOS XE=2.5.0
Cisco IOS XE=2.5.1
Cisco IOS XE=2.6.0
Cisco IOS XE=2.6.1
Cisco IOS XE=3.1.0s
Cisco IOS XE=3.1.1s
Cisco IOS XE=3.1.2s
Cisco IOS XE=3.1.3as
Cisco IOS XE=3.1.4s
Cisco IOS XE=3.2.0s
Cisco IOS XE=3.2.1s
Cisco IOS XE=3.2.2s
Cisco IOS XE=3.3.0s
Cisco IOS XE=3.3.0se
Cisco IOS XE=3.3.1s
Cisco IOS XE=3.3.2s
Cisco IOS XE=3.4.0as
Cisco IOS XE=3.4.0s
Cisco IOS XE=3.4.1s
Cisco IOS XE=3.4.2s
Cisco IOS XE=3.4.3s
Cisco IOS XE=3.4.4s
Cisco IOS XE=3.4.5s
Cisco IOS XE=3.4.6s
Cisco IOS XE=3.5.0s
Cisco IOS XE=3.5.1s
Cisco IOS XE=3.5.2s
Cisco IOS XE=3.6.0s
Cisco IOS XE=3.6.1s
Cisco IOS XE=3.6.2s
Cisco IOS XE=3.7.0s
Cisco IOS XE=3.7.1s
Cisco IOS XE=3.7.2s
Cisco IOS XE=3.7.3s
Cisco IOS XE=3.7.4as
Cisco IOS XE=3.7.4s
Cisco IOS XE=3.7.5s
Cisco IOS XE=3.7.6s
Cisco IOS XE=3.7.7s
Cisco IOS XE=3.8.0ex
Cisco IOS XE=3.8.0s
Cisco IOS XE=3.8.1s
Cisco IOS XE=3.8.2s
Cisco IOS XE=3.9.0s
Cisco IOS XE=3.9.1s
Cisco IOS XE=3.9.2s
Cisco IOS XE=3.10.0s
Cisco IOS XE=3.10.1s
Cisco IOS XE=3.10.2s
Cisco IOS XE=3.10.3s
Cisco IOS XE=3.10.4s
Cisco IOS XE=3.10.5s
Cisco IOS XE=3.10.6s
Cisco IOS XE=3.10.7s
Cisco IOS XE=3.10.8as
Cisco IOS XE=3.10.8s
Cisco IOS XE=3.11.0s
Cisco IOS XE=3.11.2s
Cisco IOS XE=3.11.3s
Cisco IOS XE=3.11.4s
Cisco IOS XE=3.12.0s
Cisco IOS XE=3.12.1s
Cisco IOS XE=3.12.2s
Cisco IOS XE=3.12.3s
Cisco IOS XE=3.12.4s
Cisco IOS XE=3.13.0s
Cisco IOS XE=3.13.1s
Cisco IOS XE=3.13.2s
Cisco IOS XE=3.13.4s
Cisco IOS XE=3.13.5s
Cisco IOS XE=3.13.6as
Cisco IOS XE=3.13.6s
Cisco IOS XE=3.14.0s
Cisco IOS XE=3.14.1s
Cisco IOS XE=3.14.2s
Cisco IOS XE=3.14.3s
Cisco IOS XE=3.14.4s
Cisco IOS XE=3.15.0s
Cisco IOS XE=3.15.1s
Cisco IOS XE=3.15.2s
Cisco IOS XE=3.15.3s
Cisco IOS XE=3.15.4s
Cisco IOS XE=3.16.0s
Cisco IOS XE=3.16.2s
Cisco IOS XE=3.16.3s
Cisco IOS XE=3.16.4s
Cisco IOS XE=3.16.5s
Cisco IOS XE=3.17.0s
Cisco IOS XE=3.17.1s

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-6742?

    The severity of CVE-2017-6742 is considered critical as it allows authenticated remote attackers to execute arbitrary code on vulnerable Cisco IOS and IOS XE devices.

  • How do I fix CVE-2017-6742?

    To fix CVE-2017-6742, upgrade the Cisco IOS or IOS XE software to a version that is not affected by this vulnerability.

  • Which Cisco products are affected by CVE-2017-6742?

    CVE-2017-6742 affects various versions of Cisco IOS from 12.0 to 12.4 and 15.0 to 15.6, as well as IOS XE versions from 2.2 to 3.17.

  • What type of attack can CVE-2017-6742 facilitate?

    CVE-2017-6742 can facilitate remote code execution attacks by allowing authenticated attackers to execute arbitrary code.

  • Is there a workaround for CVE-2017-6742 before applying a patch?

    There are no specific workarounds for CVE-2017-6742, so patching is recommended as the primary means of mitigation.

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