medium
4.3
CWE
200 310
Advisory Published
Updated

CVE-2015-4217: Infoleak

First published: Fri Jun 26 2015(Updated: )

The remote-support feature on Cisco Web Security Virtual Appliance (WSAv), Email Security Virtual Appliance (ESAv), and Security Management Virtual Appliance (SMAv) devices before 2015-06-25 uses the same default SSH host keys across different customers' installations, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging knowledge of a private key from another installation, aka Bug IDs CSCus29681, CSCuu95676, and CSCuu96601.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Content Security Management Virtual Appliance=8.4.0.0150
Cisco Content Security Management Virtual Appliance=9.0.0.087
SonicWall Email Security Virtual Appliance=8.0.0
SonicWall Email Security Virtual Appliance=8.5.6
SonicWall Email Security Virtual Appliance=8.5.7
SonicWall Email Security Virtual Appliance=9.0.0
Cisco Web Security Virtual Appliance=7.7.5
Cisco Web Security Virtual Appliance=8.0.5
Cisco Web Security Virtual Appliance=8.5.0
Cisco Web Security Virtual Appliance=8.5.1
Cisco Web Security Virtual Appliance=8.6.0
Cisco Web Security Virtual Appliance=8.7.0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-4217?

    CVE-2015-4217 is classified as a high severity vulnerability due to the risk of unauthorized remote access.

  • How do I fix CVE-2015-4217?

    To fix CVE-2015-4217, you should update your Cisco Web Security Virtual Appliance, Email Security Virtual Appliance, or Security Management Virtual Appliance to a version that addresses this vulnerability.

  • What systems are affected by CVE-2015-4217?

    CVE-2015-4217 affects several Cisco appliances including versions of Web Security, Email Security, and Content Security Management Virtual Appliances prior to specific updates.

  • What risk does CVE-2015-4217 pose to my network?

    CVE-2015-4217 poses a risk of potential unauthorized access as multiple installations may share the same default SSH host keys.

  • Are there any workarounds for CVE-2015-4217?

    Currently, the best workaround for CVE-2015-4217 is to disable remote support until a patch is applied.

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