CVE-2020-3209: Cisco IOS XE Software Digital Signature Verification Bypass Vulnerability

Published Jun 3, 2020
·
Updated

A vulnerability in software image verification in Cisco IOS XE Software could allow an unauthenticated, physical attacker to install and boot a malicious software image or execute unsigned binaries on an affected device. The vulnerability is due to an improper check on the area of code that manages the verification of the digital signatures of system image files during the initial boot process. An attacker could exploit this vulnerability by loading unsigned software on an affected device. A successful exploit could allow the attacker to install and boot a malicious software image or execute unsigned binaries on the targeted device.

Affected Software

314 affected components
Cisco IOS XE=3.2.0se
Cisco IOS XE=3.2.0sg
Cisco IOS XE=3.2.1se
Cisco IOS XE=3.2.1sg
Cisco IOS XE=3.2.2se
Cisco IOS XE=3.2.2sg
Cisco IOS XE=3.2.3se
Cisco IOS XE=3.2.3sg
Cisco IOS XE=3.2.4sg
Cisco IOS XE=3.2.5sg
Cisco IOS XE=3.2.6sg
Cisco IOS XE=3.2.7sg
Cisco IOS XE=3.2.8sg
Cisco IOS XE=3.2.9sg
Cisco IOS XE=3.2.10sg
Cisco IOS XE=3.2.11sg
Cisco IOS XE=3.3.0se
Cisco IOS XE=3.3.0sg
Cisco IOS XE=3.3.0sq
Cisco IOS XE=3.3.0xo
Cisco IOS XE=3.3.1se
Cisco IOS XE=3.3.1sg
Cisco IOS XE=3.3.1sq
Cisco IOS XE=3.3.1xo
Cisco IOS XE=3.3.2se
Cisco IOS XE=3.3.2sg
Cisco IOS XE=3.3.2xo
Cisco IOS XE=3.3.3se
Cisco IOS XE=3.3.4se
Cisco IOS XE=3.3.5se
Cisco IOS XE=3.4.0sg
Cisco IOS XE=3.4.0sq
Cisco IOS XE=3.4.1sg
Cisco IOS XE=3.4.1sq
Cisco IOS XE=3.4.2sg
Cisco IOS XE=3.4.3sg
Cisco IOS XE=3.4.4sg
Cisco IOS XE=3.4.5sg
Cisco IOS XE=3.4.6sg
Cisco IOS XE=3.4.7sg
Cisco IOS XE=3.4.8sg
Cisco IOS XE=3.5.0e
Cisco IOS XE=3.5.0sq
Cisco IOS XE=3.5.1e
Cisco IOS XE=3.5.1sq
Cisco IOS XE=3.5.2e
Cisco IOS XE=3.5.2sq
Cisco IOS XE=3.5.3e
Cisco IOS XE=3.5.3sq
Cisco IOS XE=3.5.4sq
Cisco IOS XE=3.5.5sq
Cisco IOS XE=3.5.6sq
Cisco IOS XE=3.5.7sq
Cisco IOS XE=3.5.8sq
Cisco IOS XE=3.6.0ae
Cisco IOS XE=3.6.0be
Cisco IOS XE=3.6.0e
Cisco IOS XE=3.6.1e
Cisco IOS XE=3.6.2ae
Cisco IOS XE=3.6.3e
Cisco IOS XE=3.6.4e
Cisco IOS XE=3.6.5ae
Cisco IOS XE=3.6.5be
Cisco IOS XE=3.6.5e
Cisco IOS XE=3.6.6e
Cisco IOS XE=3.6.7ae
Cisco IOS XE=3.6.7be
Cisco IOS XE=3.6.7e
Cisco IOS XE=3.6.8e
Cisco IOS XE=3.6.9ae
Cisco IOS XE=3.6.9e
Cisco IOS XE=3.6.10e
Cisco IOS XE=3.7.0bs
Cisco IOS XE=3.7.0e
Cisco IOS XE=3.7.0s
Cisco IOS XE=3.7.1as
Cisco IOS XE=3.7.1e
Cisco IOS XE=3.7.1s
Cisco IOS XE=3.7.2e
Cisco IOS XE=3.7.2s
Cisco IOS XE=3.7.2ts
Cisco IOS XE=3.7.3e
Cisco IOS XE=3.7.3s
Cisco IOS XE=3.7.4as
Cisco IOS XE=3.7.4e
Cisco IOS XE=3.7.4s
Cisco IOS XE=3.7.5e
Cisco IOS XE=3.7.5s
Cisco IOS XE=3.7.6s
Cisco IOS XE=3.7.7s
Cisco IOS XE=3.7.8s
Cisco IOS XE=3.8.0e
Cisco IOS XE=3.8.0s
Cisco IOS XE=3.8.1e
Cisco IOS XE=3.8.1s
Cisco IOS XE=3.8.2e
Cisco IOS XE=3.8.2s
Cisco IOS XE=3.8.3e
Cisco IOS XE=3.8.4e
Cisco IOS XE=3.8.5ae
Cisco IOS XE=3.8.5e
Cisco IOS XE=3.8.6e
Cisco IOS XE=3.8.7e
Cisco IOS XE=3.8.8e
Cisco IOS XE=3.8.9e
Cisco IOS XE=3.9.0as
Cisco IOS XE=3.9.0e
Cisco IOS XE=3.9.0s
Cisco IOS XE=3.9.1as
Cisco IOS XE=3.9.1e
Cisco IOS XE=3.9.1s
Cisco IOS XE=3.9.2be
Cisco IOS XE=3.9.2e
Cisco IOS XE=3.9.2s
Cisco IOS XE=3.10.0ce
Cisco IOS XE=3.10.0e
Cisco IOS XE=3.10.0s
Cisco IOS XE=3.10.1ae
Cisco IOS XE=3.10.1e
Cisco IOS XE=3.10.1s
Cisco IOS XE=3.10.1se
Cisco IOS XE=3.10.2as
Cisco IOS XE=3.10.2e
Cisco IOS XE=3.10.2s
Cisco IOS XE=3.10.2ts
Cisco IOS XE=3.10.3e
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=3.10.9s
Cisco IOS XE=3.10.10s
Cisco IOS XE=3.11.0e
Cisco IOS XE=3.11.0s
Cisco IOS XE=3.11.1e
Cisco IOS XE=3.11.1s
Cisco IOS XE=3.11.2s
Cisco IOS XE=3.11.3e
Cisco IOS XE=3.11.3s
Cisco IOS XE=3.11.4s
Cisco IOS XE=3.12.0as
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=3.13.0as
Cisco IOS XE=3.13.0s
Cisco IOS XE=3.13.1s
Cisco IOS XE=3.13.2as
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=3.13.6bs
Cisco IOS XE=3.13.6s
Cisco IOS XE=3.13.7as
Cisco IOS XE=3.13.7s
Cisco IOS XE=3.13.8s
Cisco IOS XE=3.13.9s
Cisco IOS XE=3.13.10s
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=3.16.0as
Cisco IOS XE=3.16.0bs
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=3.16.4cs
Cisco IOS XE=3.16.4ds
Cisco IOS XE=3.16.4es
Cisco IOS XE=3.16.4gs
Cisco IOS XE=3.16.4s
Cisco IOS XE=3.16.5as
Cisco IOS XE=3.16.5bs
Cisco IOS XE=3.16.5s
Cisco IOS XE=3.16.6bs
Cisco IOS XE=3.16.6s
Cisco IOS XE=3.16.7as
Cisco IOS XE=3.16.7bs
Cisco IOS XE=3.16.7s
Cisco IOS XE=3.16.8s
Cisco IOS XE=3.16.9s
Cisco IOS XE=3.16.10s
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=3.17.4s
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=3.18.1csp
Cisco IOS XE=3.18.1gsp
Cisco IOS XE=3.18.1hsp
Cisco IOS XE=3.18.1isp
Cisco IOS XE=3.18.1s
Cisco IOS XE=3.18.1sp
Cisco IOS XE=3.18.2asp
Cisco IOS XE=3.18.2s
Cisco IOS XE=3.18.2sp
Cisco IOS XE=3.18.3asp
Cisco IOS XE=3.18.3bsp
Cisco IOS XE=3.18.3s
Cisco IOS XE=3.18.3sp
Cisco IOS XE=3.18.4s
Cisco IOS XE=3.18.4sp
Cisco IOS XE=3.18.5sp
Cisco IOS XE=3.18.6sp
Cisco IOS XE=3.18.7sp
Cisco IOS XE=3.18.8sp
Cisco IOS XE=16.1.1
Cisco IOS XE=16.1.2
Cisco IOS XE=16.1.3
Cisco IOS XE=16.2.1
Cisco IOS XE=16.2.2
Cisco IOS XE=16.3.1
Cisco IOS XE=16.3.1a
Cisco IOS XE=16.3.2
Cisco IOS XE=16.3.3
Cisco IOS XE=16.3.4
Cisco IOS XE=16.3.5
Cisco IOS XE=16.3.5b
Cisco IOS XE=16.3.6
Cisco IOS XE=16.3.7
Cisco IOS XE=16.3.8
Cisco IOS XE=16.4.1
Cisco IOS XE=16.4.2
Cisco IOS XE=16.4.3
Cisco IOS XE=16.5.1
Cisco IOS XE=16.5.1a
Cisco IOS XE=16.5.1b
Cisco IOS XE=16.5.2
Cisco IOS XE=16.5.3
Cisco IOS XE=16.6.1
Cisco IOS XE=16.6.2
Cisco IOS XE=16.6.3
Cisco IOS XE=16.6.4
Cisco IOS XE=16.6.4a
Cisco IOS XE=16.6.4s
Cisco IOS XE=16.6.5
Cisco IOS XE=16.6.5a
Cisco IOS XE=16.6.5b
Cisco IOS XE=16.6.6
Cisco IOS XE=16.6.7
Cisco IOS XE=16.6.7a
Cisco IOS XE=16.7.1
Cisco IOS XE=16.7.1a
Cisco IOS XE=16.7.1b
Cisco IOS XE=16.7.2
Cisco IOS XE=16.7.3
Cisco IOS XE=16.7.4
Cisco IOS XE=16.8.1
Cisco IOS XE=16.8.1a
Cisco IOS XE=16.8.1b
Cisco IOS XE=16.8.1c
Cisco IOS XE=16.8.1d
Cisco IOS XE=16.8.1e
Cisco IOS XE=16.8.1s
Cisco IOS XE=16.8.2
Cisco IOS XE=16.8.3
Cisco IOS XE=16.9.1
Cisco IOS XE=16.9.1a
Cisco IOS XE=16.9.1b
Cisco IOS XE=16.9.1c
Cisco IOS XE=16.9.1d
Cisco IOS XE=16.9.1s
Cisco IOS XE=16.9.2
Cisco IOS XE=16.9.2a
Cisco IOS XE=16.9.2s
Cisco IOS XE=16.9.3
Cisco IOS XE=16.9.3h
Cisco IOS XE=16.9.3s
Cisco IOS XE=16.9.4
Cisco IOS XE=16.9.4c
Cisco IOS XE=16.10.1
Cisco IOS XE=16.10.1a
Cisco IOS XE=16.10.1b
Cisco IOS XE=16.10.1c
Cisco IOS XE=16.10.1d
Cisco IOS XE=16.10.1e
Cisco IOS XE=16.10.1f
Cisco IOS XE=16.10.1g
Cisco IOS XE=16.10.1s
Cisco IOS XE=16.10.2
Cisco IOS XE=16.11.1
Cisco IOS XE=16.11.1a
Cisco IOS XE=16.11.1b
Cisco IOS XE=16.12.1y

Remediation

Patch Available

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-digsig-bypass-FYQ3bmVq

Event History

Jun 3, 2020
CVE Published
via MITRE·05:40 PM
Data Sourced
via MITRE·05:40 PM
DescriptionSeverityWeakness

Frequently Asked Questions

1

What is the severity of CVE-2020-3209?

CVE-2020-3209 is rated as high severity due to its potential to let an attacker install malicious software on affected devices.

2

How do I fix CVE-2020-3209?

To mitigate CVE-2020-3209, users should upgrade to the appropriate Cisco IOS XE software version that addresses this vulnerability.

3

Which versions of Cisco IOS XE are affected by CVE-2020-3209?

CVE-2020-3209 affects Cisco IOS XE versions 3.2.0se, 3.2.0sg, 3.2.1se, 3.2.1sg, and up to 3.17.4s.

4

What are the potential impacts of CVE-2020-3209 vulnerability?

If exploited, CVE-2020-3209 could allow an unauthorized user to execute unsigned binaries and potentially take control of the affected device.

5

Is there a workaround for CVE-2020-3209 if I cannot immediately patch?

Currently, Cisco does not recommend any specific workarounds for CVE-2020-3209 other than applying the relevant software updates.

Company

Resources

Contact

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