What is the severity of CVE-2017-3856?

CVE-2017-3856 has a CVSS score of 7.5, indicating it is a high severity vulnerability.

How do I fix CVE-2017-3856?

To fix CVE-2017-3856, upgrade your Cisco IOS XE to a version that applies the necessary patches.

What can an attacker do exploiting CVE-2017-3856?

An attacker exploiting CVE-2017-3856 can cause an affected device to reload, leading to denial of service.

Which versions of Cisco IOS XE are affected by CVE-2017-3856?

CVE-2017-3856 affects Cisco IOS XE versions 3.1 through 3.17.

Is there a workaround for CVE-2017-3856?

Currently, the recommended action is to apply the software updates; no specific workaround is provided.

Vulnerability/
CVE-2017-3856

high

7.8

CWE

400 399

22/3/2017

3/10/2019

CVE-2017-3856

First published: Wed Mar 22 2017(Updated: )

A vulnerability in the web user interface of Cisco IOS XE 3.1 through 3.17 could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to insufficient resource handling by the affected software when the web user interface is under a high load. An attacker could exploit this vulnerability by sending a high number of requests to the web user interface of the affected software. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. To exploit this vulnerability, the attacker must have access to the management interface of the affected software, which is typically connected to a restricted management network. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XE Software, if the web user interface of the software is enabled. By default, the web user interface is not enabled. Cisco Bug IDs: CSCup70353.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS XE Software	=3.1.0s
Cisco IOS XE Software	=3.1.0sg
Cisco IOS XE Software	=3.1.1s
Cisco IOS XE Software	=3.1.1sg
Cisco IOS XE Software	=3.1.2s
Cisco IOS XE Software	=3.1.3as
Cisco IOS XE Software	=3.1.3s
Cisco IOS XE Software	=3.1.4as
Cisco IOS XE Software	=3.1.4s
Cisco IOS XE Software	=3.1s
Cisco IOS XE Software	=3.1sg
Cisco IOS XE Software	=3.2.0ja
Cisco IOS XE Software	=3.2.0se
Cisco IOS XE Software	=3.2.0sg
Cisco IOS XE Software	=3.2.0xo
Cisco IOS XE Software	=3.2.1s
Cisco IOS XE Software	=3.2.1se
Cisco IOS XE Software	=3.2.1sg
Cisco IOS XE Software	=3.2.1xo
Cisco IOS XE Software	=3.2.2s
Cisco IOS XE Software	=3.2.2se
Cisco IOS XE Software	=3.2.2sg
Cisco IOS XE Software	=3.2.3se
Cisco IOS XE Software	=3.2.3sg
Cisco IOS XE Software	=3.2.4sg
Cisco IOS XE Software	=3.2.5sg
Cisco IOS XE Software	=3.2.6sg
Cisco IOS XE Software	=3.2.7sg
Cisco IOS XE Software	=3.2.8sg
Cisco IOS XE Software	=3.2.9sg
Cisco IOS XE Software	=3.2.11sg
Cisco IOS XE Software	=3.2ja
Cisco IOS XE Software	=3.2s
Cisco IOS XE Software	=3.2se
Cisco IOS XE Software	=3.2sg
Cisco IOS XE Software	=3.2xo
Cisco IOS XE Software	=3.3.0s
Cisco IOS XE Software	=3.3.0se
Cisco IOS XE Software	=3.3.0sg
Cisco IOS XE Software	=3.3.0sq
Cisco IOS XE Software	=3.3.0xo
Cisco IOS XE Software	=3.3.1s
Cisco IOS XE Software	=3.3.1se
Cisco IOS XE Software	=3.3.1sg
Cisco IOS XE Software	=3.3.1sq
Cisco IOS XE Software	=3.3.1xo
Cisco IOS XE Software	=3.3.2s
Cisco IOS XE Software	=3.3.2se
Cisco IOS XE Software	=3.3.2sg
Cisco IOS XE Software	=3.3.2xo
Cisco IOS XE Software	=3.3.3se
Cisco IOS XE Software	=3.3.4se
Cisco IOS XE Software	=3.3.5se
Cisco IOS XE Software	=3.3s
Cisco IOS XE Software	=3.3se
Cisco IOS XE Software	=3.3sg
Cisco IOS XE Software	=3.3sq
Cisco IOS XE Software	=3.3xo
Cisco IOS XE Software	=3.4.0as
Cisco IOS XE Software	=3.4.0s
Cisco IOS XE Software	=3.4.0sg
Cisco IOS XE Software	=3.4.0sq
Cisco IOS XE Software	=3.4.1s
Cisco IOS XE Software	=3.4.1sg
Cisco IOS XE Software	=3.4.1sq
Cisco IOS XE Software	=3.4.2s
Cisco IOS XE Software	=3.4.2sg
Cisco IOS XE Software	=3.4.3s
Cisco IOS XE Software	=3.4.3sg
Cisco IOS XE Software	=3.4.4s
Cisco IOS XE Software	=3.4.4sg
Cisco IOS XE Software	=3.4.5s
Cisco IOS XE Software	=3.4.5sg
Cisco IOS XE Software	=3.4.6s
Cisco IOS XE Software	=3.4.6sg
Cisco IOS XE Software	=3.4.7sg
Cisco IOS XE Software	=3.4.8sg
Cisco IOS XE Software	=3.4s
Cisco IOS XE Software	=3.4sg
Cisco IOS XE Software	=3.4sq
Cisco IOS XE Software	=3.5.0e
Cisco IOS XE Software	=3.5.0s
Cisco IOS XE Software	=3.5.0sq
Cisco IOS XE Software	=3.5.1e
Cisco IOS XE Software	=3.5.1s
Cisco IOS XE Software	=3.5.1sq
Cisco IOS XE Software	=3.5.2e
Cisco IOS XE Software	=3.5.2s
Cisco IOS XE Software	=3.5.2sq
Cisco IOS XE Software	=3.5.3e
Cisco IOS XE Software	=3.5.3sq
Cisco IOS XE Software	=3.5.4sq
Cisco IOS XE Software	=3.5.5sq
Cisco IOS XE Software	=3.5e
Cisco IOS XE Software	=3.5s
Cisco IOS XE Software	=3.5sq
Cisco IOS XE Software	=3.6.0e
Cisco IOS XE Software	=3.6.0s
Cisco IOS XE Software	=3.6.1e
Cisco IOS XE Software	=3.6.1s
Cisco IOS XE Software	=3.6.2ae
Cisco IOS XE Software	=3.6.2s
Cisco IOS XE Software	=3.6.3e
Cisco IOS XE Software	=3.6.4e
Cisco IOS XE Software	=3.6.5ae
Cisco IOS XE Software	=3.6.5be
Cisco IOS XE Software	=3.6.5e
Cisco IOS XE Software	=3.6e
Cisco IOS XE Software	=3.6s
Cisco IOS XE Software	=3.7.0bs
Cisco IOS XE Software	=3.7.0e
Cisco IOS XE Software	=3.7.0s
Cisco IOS XE Software	=3.7.1e
Cisco IOS XE Software	=3.7.1s
Cisco IOS XE Software	=3.7.2e
Cisco IOS XE Software	=3.7.2s
Cisco IOS XE Software	=3.7.2ts
Cisco IOS XE Software	=3.7.3e
Cisco IOS XE Software	=3.7.3s
Cisco IOS XE Software	=3.7.4e
Cisco IOS XE Software	=3.7.4s
Cisco IOS XE Software	=3.7.5s
Cisco IOS XE Software	=3.7.6s
Cisco IOS XE Software	=3.7.7s
Cisco IOS XE Software	=3.7e
Cisco IOS XE Software	=3.7s
Cisco IOS XE Software	=3.8.0e
Cisco IOS XE Software	=3.8.0ex
Cisco IOS XE Software	=3.8.0s
Cisco IOS XE Software	=3.8.1e
Cisco IOS XE Software	=3.8.1s
Cisco IOS XE Software	=3.8.2e
Cisco IOS XE Software	=3.8.2s
Cisco IOS XE Software	=3.8e
Cisco IOS XE Software	=3.8ex
Cisco IOS XE Software	=3.8s
Cisco IOS XE Software	=3.9.0e
Cisco IOS XE Software	=3.9.0s
Cisco IOS XE Software	=3.9.1s
Cisco IOS XE Software	=3.9.2s
Cisco IOS XE Software	=3.9e
Cisco IOS XE Software	=3.9s
Cisco IOS XE Software	=3.10.0s
Cisco IOS XE Software	=3.10.1s
Cisco IOS XE Software	=3.10.1xbs
Cisco IOS XE Software	=3.10.2s
Cisco IOS XE Software	=3.10.2ts
Cisco IOS XE Software	=3.10.3s
Cisco IOS XE Software	=3.10.4s
Cisco IOS XE Software	=3.10.5s
Cisco IOS XE Software	=3.10.6s
Cisco IOS XE Software	=3.10.7s
Cisco IOS XE Software	=3.10.8s
Cisco IOS XE Software	=3.10s
Cisco IOS XE Software	=3.11.0s
Cisco IOS XE Software	=3.11.1s
Cisco IOS XE Software	=3.11.2s
Cisco IOS XE Software	=3.11.3s
Cisco IOS XE Software	=3.11.4s
Cisco IOS XE Software	=3.11s
Cisco IOS XE Software	=3.12.0as
Cisco IOS XE Software	=3.12.0s
Cisco IOS XE Software	=3.12.1s
Cisco IOS XE Software	=3.12.2s
Cisco IOS XE Software	=3.12.3s
Cisco IOS XE Software	=3.12.4s
Cisco IOS XE Software	=3.12s
Cisco IOS XE Software	=3.13.0as
Cisco IOS XE Software	=3.13.0s
Cisco IOS XE Software	=3.13.1s
Cisco IOS XE Software	=3.13.2as
Cisco IOS XE Software	=3.13.2s
Cisco IOS XE Software	=3.13.3s
Cisco IOS XE Software	=3.13.4s
Cisco IOS XE Software	=3.13s
Cisco IOS XE Software	=3.14.0s
Cisco IOS XE Software	=3.14.1s
Cisco IOS XE Software	=3.14.2s
Cisco IOS XE Software	=3.14.3s
Cisco IOS XE Software	=3.14.4s
Cisco IOS XE Software	=3.14s
Cisco IOS XE Software	=3.15.0s
Cisco IOS XE Software	=3.15.1cs
Cisco IOS XE Software	=3.15.1s
Cisco IOS XE Software	=3.15.2s
Cisco IOS XE Software	=3.15.3s
Cisco IOS XE Software	=3.15s
Cisco IOS XE Software	=3.16.0cs
Cisco IOS XE Software	=3.16.0s
Cisco IOS XE Software	=3.16.1as
Cisco IOS XE Software	=3.16.1s
Cisco IOS XE Software	=3.16s
Cisco IOS XE Software	=3.17.0s
Cisco IOS XE Software	=3.17.1as
Cisco IOS XE Software	=3.17.1s
Cisco IOS XE Software	=3.17.2s
Cisco IOS XE Software	=3.17.3s
Cisco IOS XE Software	=3.17s

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2017-3856?
CVE-2017-3856 has a CVSS score of 7.5, indicating it is a high severity vulnerability.
How do I fix CVE-2017-3856?
To fix CVE-2017-3856, upgrade your Cisco IOS XE to a version that applies the necessary patches.
What can an attacker do exploiting CVE-2017-3856?
An attacker exploiting CVE-2017-3856 can cause an affected device to reload, leading to denial of service.
Which versions of Cisco IOS XE are affected by CVE-2017-3856?
CVE-2017-3856 affects Cisco IOS XE versions 3.1 through 3.17.
Is there a workaround for CVE-2017-3856?
Currently, the recommended action is to apply the software updates; no specific workaround is provided.

agent/weakness
agent/type
agent/last-modified-date
agent/first-publish-date
agent/references
agent/severity
agent/author
agent/description
agent/event
agent/tags
agent/softwarecombine
collector/nvd-index
agent/software-canonical-lookup-request
vendor/cisco
canonical/cisco ios xe
version/cisco ios xe/3.1.0s
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version/cisco ios xe/3.1.1s
version/cisco ios xe/3.1.1sg
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version/cisco ios xe/3.1.3as
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version/cisco ios xe/3.1.4s
version/cisco ios xe/3.1s
version/cisco ios xe/3.1sg
version/cisco ios xe/3.2.0ja
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version/cisco ios xe/3.2.1s
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version/cisco ios xe/3.2ja
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version/cisco ios xe/3.3.0sq
version/cisco ios xe/3.3.0xo
version/cisco ios xe/3.3.1s
version/cisco ios xe/3.3.1se
version/cisco ios xe/3.3.1sg
version/cisco ios xe/3.3.1sq
version/cisco ios xe/3.3.1xo
version/cisco ios xe/3.3.2s
version/cisco ios xe/3.3.2se
version/cisco ios xe/3.3.2sg
version/cisco ios xe/3.3.2xo
version/cisco ios xe/3.3.3se
version/cisco ios xe/3.3.4se
version/cisco ios xe/3.3.5se
version/cisco ios xe/3.3s
version/cisco ios xe/3.3se
version/cisco ios xe/3.3sg
version/cisco ios xe/3.3sq
version/cisco ios xe/3.3xo
version/cisco ios xe/3.4.0as
version/cisco ios xe/3.4.0s
version/cisco ios xe/3.4.0sg
version/cisco ios xe/3.4.0sq
version/cisco ios xe/3.4.1s
version/cisco ios xe/3.4.1sg
version/cisco ios xe/3.4.1sq
version/cisco ios xe/3.4.2s
version/cisco ios xe/3.4.2sg
version/cisco ios xe/3.4.3s
version/cisco ios xe/3.4.3sg
version/cisco ios xe/3.4.4s
version/cisco ios xe/3.4.4sg
version/cisco ios xe/3.4.5s
version/cisco ios xe/3.4.5sg
version/cisco ios xe/3.4.6s
version/cisco ios xe/3.4.6sg
version/cisco ios xe/3.4.7sg
version/cisco ios xe/3.4.8sg
version/cisco ios xe/3.4s
version/cisco ios xe/3.4sg
version/cisco ios xe/3.4sq
version/cisco ios xe/3.5.0e
version/cisco ios xe/3.5.0s
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version/cisco ios xe/3.5.1e
version/cisco ios xe/3.5.1s
version/cisco ios xe/3.5.1sq
version/cisco ios xe/3.5.2e
version/cisco ios xe/3.5.2s
version/cisco ios xe/3.5.2sq
version/cisco ios xe/3.5.3e
version/cisco ios xe/3.5.3sq
version/cisco ios xe/3.5.4sq
version/cisco ios xe/3.5.5sq
version/cisco ios xe/3.5e
version/cisco ios xe/3.5s
version/cisco ios xe/3.5sq
version/cisco ios xe/3.6.0e
version/cisco ios xe/3.6.0s
version/cisco ios xe/3.6.1e
version/cisco ios xe/3.6.1s
version/cisco ios xe/3.6.2ae
version/cisco ios xe/3.6.2s
version/cisco ios xe/3.6.3e
version/cisco ios xe/3.6.4e
version/cisco ios xe/3.6.5ae
version/cisco ios xe/3.6.5be
version/cisco ios xe/3.6.5e
version/cisco ios xe/3.6e
version/cisco ios xe/3.6s
version/cisco ios xe/3.7.0bs
version/cisco ios xe/3.7.0e
version/cisco ios xe/3.7.0s
version/cisco ios xe/3.7.1e
version/cisco ios xe/3.7.1s
version/cisco ios xe/3.7.2e
version/cisco ios xe/3.7.2s
version/cisco ios xe/3.7.2ts
version/cisco ios xe/3.7.3e
version/cisco ios xe/3.7.3s
version/cisco ios xe/3.7.4e
version/cisco ios xe/3.7.4s
version/cisco ios xe/3.7.5s
version/cisco ios xe/3.7.6s
version/cisco ios xe/3.7.7s
version/cisco ios xe/3.7e
version/cisco ios xe/3.7s
version/cisco ios xe/3.8.0e
version/cisco ios xe/3.8.0ex
version/cisco ios xe/3.8.0s
version/cisco ios xe/3.8.1e
version/cisco ios xe/3.8.1s
version/cisco ios xe/3.8.2e
version/cisco ios xe/3.8.2s
version/cisco ios xe/3.8e
version/cisco ios xe/3.8ex
version/cisco ios xe/3.8s
version/cisco ios xe/3.9.0e
version/cisco ios xe/3.9.0s
version/cisco ios xe/3.9.1s
version/cisco ios xe/3.9.2s
version/cisco ios xe/3.9e
version/cisco ios xe/3.9s
version/cisco ios xe/3.10.0s
version/cisco ios xe/3.10.1s
version/cisco ios xe/3.10.1xbs
version/cisco ios xe/3.10.2s
version/cisco ios xe/3.10.2ts
version/cisco ios xe/3.10.3s
version/cisco ios xe/3.10.4s
version/cisco ios xe/3.10.5s
version/cisco ios xe/3.10.6s
version/cisco ios xe/3.10.7s
version/cisco ios xe/3.10.8s
version/cisco ios xe/3.10s
version/cisco ios xe/3.11.0s
version/cisco ios xe/3.11.1s
version/cisco ios xe/3.11.2s
version/cisco ios xe/3.11.3s
version/cisco ios xe/3.11.4s
version/cisco ios xe/3.11s
version/cisco ios xe/3.12.0as
version/cisco ios xe/3.12.0s
version/cisco ios xe/3.12.1s
version/cisco ios xe/3.12.2s
version/cisco ios xe/3.12.3s
version/cisco ios xe/3.12.4s
version/cisco ios xe/3.12s
version/cisco ios xe/3.13.0as
version/cisco ios xe/3.13.0s
version/cisco ios xe/3.13.1s
version/cisco ios xe/3.13.2as
version/cisco ios xe/3.13.2s
version/cisco ios xe/3.13.3s
version/cisco ios xe/3.13.4s
version/cisco ios xe/3.13s
version/cisco ios xe/3.14.0s
version/cisco ios xe/3.14.1s
version/cisco ios xe/3.14.2s
version/cisco ios xe/3.14.3s
version/cisco ios xe/3.14.4s
version/cisco ios xe/3.14s
version/cisco ios xe/3.15.0s
version/cisco ios xe/3.15.1cs
version/cisco ios xe/3.15.1s
version/cisco ios xe/3.15.2s
version/cisco ios xe/3.15.3s
version/cisco ios xe/3.15s
version/cisco ios xe/3.16.0cs
version/cisco ios xe/3.16.0s
version/cisco ios xe/3.16.1as
version/cisco ios xe/3.16.1s
version/cisco ios xe/3.16s
version/cisco ios xe/3.17.0s
version/cisco ios xe/3.17.1as
version/cisco ios xe/3.17.1s
version/cisco ios xe/3.17.2s
version/cisco ios xe/3.17.3s
version/cisco ios xe/3.17s