CVE-2017-3850: Input Validation

Published Mar 21, 2017

Updated

A vulnerability in the Autonomic Networking Infrastructure (ANI) feature of Cisco IOS Software (15.4 through 15.6) and Cisco IOS XE Software (3.7 through 3.18, and 16) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incomplete input validation on certain crafted packets. An attacker could exploit this vulnerability by sending a crafted IPv6 packet to a device that is running a Cisco IOS Software or Cisco IOS XE Software release that supports the ANI feature. A device must meet two conditions to be affected by this vulnerability: (1) the device must be running a version of Cisco IOS Software or Cisco IOS XE Software that supports ANI (regardless of whether ANI is configured); and (2) the device must have a reachable IPv6 interface. An exploit could allow the attacker to cause the affected device to reload. Cisco Bug IDs: CSCvc42729.

Affected Software

143 affected components

cisco IOS=15.2\(3\)e

cisco IOS=15.2\(3\)e1

cisco IOS=15.2\(3\)e2

cisco IOS=15.2\(3\)e3

cisco IOS=15.2\(4\)e

cisco IOS=15.2\(4\)e1

cisco IOS=15.2\(4\)e2

cisco IOS=15.2\(5\)e

cisco IOS=15.2\(5b\)e

cisco IOS=15.3\(3\)s

cisco IOS=15.3\(3\)s1

cisco IOS=15.3\(3\)s2

cisco IOS=15.3\(3\)s3

cisco IOS=15.3\(3\)s4

cisco IOS=15.3\(3\)s5

cisco IOS=15.3\(3\)s6

cisco IOS=15.4\(1\)s

cisco IOS=15.4\(1\)s1

cisco IOS=15.4\(1\)s2

cisco IOS=15.4\(1\)s3

cisco IOS=15.4\(1\)s4

cisco IOS=15.4\(2\)s1

cisco IOS=15.4\(2\)s2

cisco IOS=15.4\(2\)s3

cisco IOS=15.4\(2\)s4

cisco IOS=15.4\(3\)s

cisco IOS=15.4\(3\)s1

cisco IOS=15.4\(3\)s2

cisco IOS=15.4\(3\)s3

cisco IOS=15.4\(3\)s4

cisco IOS=15.4\(3\)s5

cisco IOS=15.4\(3\)s6

cisco IOS=15.5\(1\)s

cisco IOS=15.5\(1\)s1

cisco IOS=15.5\(1\)s2

cisco IOS=15.5\(1\)s3

cisco IOS=15.5\(1\)s4

cisco IOS=15.5\(2\)s

cisco IOS=15.5\(2\)s1

cisco IOS=15.5\(2\)s2

cisco IOS=15.5\(2\)s3

cisco IOS=15.5\(3\)s

cisco IOS=15.5\(3\)s0a

cisco IOS=15.5\(3\)s1

cisco IOS=15.5\(3\)s1a

cisco IOS=15.5\(3\)s2

cisco IOS=15.5\(3\)s3

cisco IOS=15.5\(3\)sn

cisco IOS=15.6\(1\)s

cisco IOS=15.6\(1\)s1

cisco IOS=15.6\(1\)s2

cisco IOS=15.6\(1\)t

cisco IOS=15.6\(1\)t0a

cisco IOS=15.6\(1\)t1

cisco IOS=15.6\(1\)t2

cisco IOS=15.6\(2\)s

cisco IOS=15.6\(2\)s1

cisco IOS=15.6\(2\)sn

cisco IOS=15.6\(2\)t

cisco IOS=15.6\(2\)t1

cisco IOS=15.6\(2\)t2

cisco IOS=15.6\(3\)m

Cisco IOS XE=3.7.0e

Cisco IOS XE=3.7.1e

Cisco IOS XE=3.7.2e

Cisco IOS XE=3.7.3e

Cisco IOS XE=3.7.4e

Cisco IOS XE=3.7.5e

Cisco IOS XE=3.8.0e

Cisco IOS XE=3.8.1e

Cisco IOS XE=3.8.2e

Cisco IOS XE=3.8.3e

Cisco IOS XE=3.9.0e

Cisco IOS XE=3.9.1e

Cisco IOS XE=3.10.0s

Cisco IOS XE=3.10.1s

Cisco IOS XE=3.10.1xbs

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=3.10.8s

Cisco IOS XE=3.11.0s

Cisco IOS XE=3.11.1s

Cisco IOS XE=3.11.2s

Cisco IOS XE=3.11.3s

Cisco IOS XE=3.11.4s

Cisco IOS XE=3.12.0as

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=3.13.0as

Cisco IOS XE=3.13.0s

Cisco IOS XE=3.13.1s

Cisco IOS XE=3.13.2s

Cisco IOS XE=3.13.3s

Cisco IOS XE=3.13.4s

Cisco IOS XE=3.13.5as

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=3.15.1cs

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=3.16.0cs

Cisco IOS XE=3.16.0s

Cisco IOS XE=3.16.1as

Cisco IOS XE=3.16.1s

Cisco IOS XE=3.16.2as

Cisco IOS XE=3.16.2bs

Cisco IOS XE=3.16.2s

Cisco IOS XE=3.16.3as

Cisco IOS XE=3.16.3s

Cisco IOS XE=3.16.4as

Cisco IOS XE=3.16.4bs

Cisco IOS XE=3.16.4ds

Cisco IOS XE=3.16.4s

Cisco IOS XE=3.16.5s

Cisco IOS XE=3.17.0s

Cisco IOS XE=3.17.1as

Cisco IOS XE=3.17.1s

Cisco IOS XE=3.17.2s

Cisco IOS XE=3.17.3s

Cisco IOS XE=3.18.0as

Cisco IOS XE=3.18.0s

Cisco IOS XE=3.18.0sp

Cisco IOS XE=3.18.1asp

Cisco IOS XE=3.18.1bsp

Cisco IOS XE=3.18.1s

Cisco IOS XE=3.18.1sp

Cisco IOS XE=3.18.2s

Cisco IOS XE=3.18.3vs

Event History

Mar 21, 2017

CVE Published

via MITRE·04:00 PM

Data Sourced

via MITRE·04:00 PM

DescriptionWeakness

Data Sourced

via NVD·04:59 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2017-3850?

CVE-2017-3850 has a CVSS score that indicates a high severity level due to its potential to cause a denial of service.

How do I fix CVE-2017-3850?

To remediate CVE-2017-3850, upgrade to a fixed version of Cisco IOS Software or IOS XE Software as specified in Cisco's advisory.

What products are affected by CVE-2017-3850?

CVE-2017-3850 affects multiple versions of Cisco IOS and Cisco IOS XE, particularly those from version 15.4 to 15.6, and several 3.x versions of IOS XE.

Can CVE-2017-3850 be exploited remotely?

Yes, CVE-2017-3850 can be exploited by an unauthenticated remote attacker, leading to a denial of service condition.

What should I do if I cannot immediately update my system for CVE-2017-3850?

If immediate updates cannot be applied for CVE-2017-3850, consider isolating affected devices from the network or implementing strict access controls.