high
7.2
CWE
347
Advisory Published
Updated

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

First published: Wed Jun 03 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.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS XE Software=3.2.0se
Cisco IOS XE Software=3.2.0sg
Cisco IOS XE Software=3.2.1se
Cisco IOS XE Software=3.2.1sg
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=3.2.10sg
Cisco IOS XE Software=3.2.11sg
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=3.3.1se
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=3.3.2se
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=3.4.0sg
Cisco IOS XE Software=3.4.0sq
Cisco IOS XE Software=3.4.1sg
Cisco IOS XE Software=3.4.1sq
Cisco IOS XE Software=3.4.2sg
Cisco IOS XE Software=3.4.3sg
Cisco IOS XE Software=3.4.4sg
Cisco IOS XE Software=3.4.5sg
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=3.5.0e
Cisco IOS XE Software=3.5.0sq
Cisco IOS XE Software=3.5.1e
Cisco IOS XE Software=3.5.1sq
Cisco IOS XE Software=3.5.2e
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=3.5.6sq
Cisco IOS XE Software=3.5.7sq
Cisco IOS XE Software=3.5.8sq
Cisco IOS XE Software=3.6.0ae
Cisco IOS XE Software=3.6.0be
Cisco IOS XE Software=3.6.0e
Cisco IOS XE Software=3.6.1e
Cisco IOS XE Software=3.6.2ae
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=3.6.6e
Cisco IOS XE Software=3.6.7ae
Cisco IOS XE Software=3.6.7be
Cisco IOS XE Software=3.6.7e
Cisco IOS XE Software=3.6.8e
Cisco IOS XE Software=3.6.9ae
Cisco IOS XE Software=3.6.9e
Cisco IOS XE Software=3.6.10e
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=3.7.1as
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=3.7.4as
Cisco IOS XE Software=3.7.4e
Cisco IOS XE Software=3.7.4s
Cisco IOS XE Software=3.7.5e
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=3.7.8s
Cisco IOS XE Software=3.8.0e
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=3.8.3e
Cisco IOS XE Software=3.8.4e
Cisco IOS XE Software=3.8.5ae
Cisco IOS XE Software=3.8.5e
Cisco IOS XE Software=3.8.6e
Cisco IOS XE Software=3.8.7e
Cisco IOS XE Software=3.8.8e
Cisco IOS XE Software=3.8.9e
Cisco IOS XE Software=3.9.0as
Cisco IOS XE Software=3.9.0e
Cisco IOS XE Software=3.9.0s
Cisco IOS XE Software=3.9.1as
Cisco IOS XE Software=3.9.1e
Cisco IOS XE Software=3.9.1s
Cisco IOS XE Software=3.9.2be
Cisco IOS XE Software=3.9.2e
Cisco IOS XE Software=3.9.2s
Cisco IOS XE Software=3.10.0ce
Cisco IOS XE Software=3.10.0e
Cisco IOS XE Software=3.10.0s
Cisco IOS XE Software=3.10.1ae
Cisco IOS XE Software=3.10.1e
Cisco IOS XE Software=3.10.1s
Cisco IOS XE Software=3.10.1se
Cisco IOS XE Software=3.10.2as
Cisco IOS XE Software=3.10.2e
Cisco IOS XE Software=3.10.2s
Cisco IOS XE Software=3.10.2ts
Cisco IOS XE Software=3.10.3e
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=3.10.8as
Cisco IOS XE Software=3.10.8s
Cisco IOS XE Software=3.10.9s
Cisco IOS XE Software=3.10.10s
Cisco IOS XE Software=3.11.0e
Cisco IOS XE Software=3.11.0s
Cisco IOS XE Software=3.11.1e
Cisco IOS XE Software=3.11.1s
Cisco IOS XE Software=3.11.2s
Cisco IOS XE Software=3.11.3e
Cisco IOS XE Software=3.11.3s
Cisco IOS XE Software=3.11.4s
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=3.13.0as
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=3.13.5as
Cisco IOS XE Software=3.13.5s
Cisco IOS XE Software=3.13.6as
Cisco IOS XE Software=3.13.6bs
Cisco IOS XE Software=3.13.6s
Cisco IOS XE Software=3.13.7as
Cisco IOS XE Software=3.13.7s
Cisco IOS XE Software=3.13.8s
Cisco IOS XE Software=3.13.9s
Cisco IOS XE Software=3.13.10s
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=3.15.0s
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=3.15.4s
Cisco IOS XE Software=3.16.0as
Cisco IOS XE Software=3.16.0bs
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=3.16.2as
Cisco IOS XE Software=3.16.2bs
Cisco IOS XE Software=3.16.2s
Cisco IOS XE Software=3.16.3as
Cisco IOS XE Software=3.16.3s
Cisco IOS XE Software=3.16.4as
Cisco IOS XE Software=3.16.4bs
Cisco IOS XE Software=3.16.4cs
Cisco IOS XE Software=3.16.4ds
Cisco IOS XE Software=3.16.4es
Cisco IOS XE Software=3.16.4gs
Cisco IOS XE Software=3.16.4s
Cisco IOS XE Software=3.16.5as
Cisco IOS XE Software=3.16.5bs
Cisco IOS XE Software=3.16.5s
Cisco IOS XE Software=3.16.6bs
Cisco IOS XE Software=3.16.6s
Cisco IOS XE Software=3.16.7as
Cisco IOS XE Software=3.16.7bs
Cisco IOS XE Software=3.16.7s
Cisco IOS XE Software=3.16.8s
Cisco IOS XE Software=3.16.9s
Cisco IOS XE Software=3.16.10s
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=3.17.4s
Cisco IOS XE Software=3.18.0as
Cisco IOS XE Software=3.18.0s
Cisco IOS XE Software=3.18.0sp
Cisco IOS XE Software=3.18.1asp
Cisco IOS XE Software=3.18.1bsp
Cisco IOS XE Software=3.18.1csp
Cisco IOS XE Software=3.18.1gsp
Cisco IOS XE Software=3.18.1hsp
Cisco IOS XE Software=3.18.1isp
Cisco IOS XE Software=3.18.1s
Cisco IOS XE Software=3.18.1sp
Cisco IOS XE Software=3.18.2asp
Cisco IOS XE Software=3.18.2s
Cisco IOS XE Software=3.18.2sp
Cisco IOS XE Software=3.18.3asp
Cisco IOS XE Software=3.18.3bsp
Cisco IOS XE Software=3.18.3s
Cisco IOS XE Software=3.18.3sp
Cisco IOS XE Software=3.18.4s
Cisco IOS XE Software=3.18.4sp
Cisco IOS XE Software=3.18.5sp
Cisco IOS XE Software=3.18.6sp
Cisco IOS XE Software=3.18.7sp
Cisco IOS XE Software=3.18.8sp
Cisco IOS XE Software=16.1.1
Cisco IOS XE Software=16.1.2
Cisco IOS XE Software=16.1.3
Cisco IOS XE Software=16.2.1
Cisco IOS XE Software=16.2.2
Cisco IOS XE Software=16.3.1
Cisco IOS XE Software=16.3.1a
Cisco IOS XE Software=16.3.2
Cisco IOS XE Software=16.3.3
Cisco IOS XE Software=16.3.4
Cisco IOS XE Software=16.3.5
Cisco IOS XE Software=16.3.5b
Cisco IOS XE Software=16.3.6
Cisco IOS XE Software=16.3.7
Cisco IOS XE Software=16.3.8
Cisco IOS XE Software=16.4.1
Cisco IOS XE Software=16.4.2
Cisco IOS XE Software=16.4.3
Cisco IOS XE Software=16.5.1
Cisco IOS XE Software=16.5.1a
Cisco IOS XE Software=16.5.1b
Cisco IOS XE Software=16.5.2
Cisco IOS XE Software=16.5.3
Cisco IOS XE Software=16.6.1
Cisco IOS XE Software=16.6.2
Cisco IOS XE Software=16.6.3
Cisco IOS XE Software=16.6.4
Cisco IOS XE Software=16.6.4a
Cisco IOS XE Software=16.6.4s
Cisco IOS XE Software=16.6.5
Cisco IOS XE Software=16.6.5a
Cisco IOS XE Software=16.6.5b
Cisco IOS XE Software=16.6.6
Cisco IOS XE Software=16.6.7
Cisco IOS XE Software=16.6.7a
Cisco IOS XE Software=16.7.1
Cisco IOS XE Software=16.7.1a
Cisco IOS XE Software=16.7.1b
Cisco IOS XE Software=16.7.2
Cisco IOS XE Software=16.7.3
Cisco IOS XE Software=16.7.4
Cisco IOS XE Software=16.8.1
Cisco IOS XE Software=16.8.1a
Cisco IOS XE Software=16.8.1b
Cisco IOS XE Software=16.8.1c
Cisco IOS XE Software=16.8.1d
Cisco IOS XE Software=16.8.1e
Cisco IOS XE Software=16.8.1s
Cisco IOS XE Software=16.8.2
Cisco IOS XE Software=16.8.3
Cisco IOS XE Software=16.9.1
Cisco IOS XE Software=16.9.1a
Cisco IOS XE Software=16.9.1b
Cisco IOS XE Software=16.9.1c
Cisco IOS XE Software=16.9.1d
Cisco IOS XE Software=16.9.1s
Cisco IOS XE Software=16.9.2
Cisco IOS XE Software=16.9.2a
Cisco IOS XE Software=16.9.2s
Cisco IOS XE Software=16.9.3
Cisco IOS XE Software=16.9.3h
Cisco IOS XE Software=16.9.3s
Cisco IOS XE Software=16.9.4
Cisco IOS XE Software=16.9.4c
Cisco IOS XE Software=16.10.1
Cisco IOS XE Software=16.10.1a
Cisco IOS XE Software=16.10.1b
Cisco IOS XE Software=16.10.1c
Cisco IOS XE Software=16.10.1d
Cisco IOS XE Software=16.10.1e
Cisco IOS XE Software=16.10.1f
Cisco IOS XE Software=16.10.1g
Cisco IOS XE Software=16.10.1s
Cisco IOS XE Software=16.10.2
Cisco IOS XE Software=16.11.1
Cisco IOS XE Software=16.11.1a
Cisco IOS XE Software=16.11.1b
Cisco IOS XE Software=16.12.1y

Remedy

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

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Reference Links

Frequently Asked Questions

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

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