cisco-sa-20190306-nxos-sig-verif: Cisco NX-OS Software Image Signature Verification Vulnerability
First published: Wed Mar 06 2019(Updated: )
A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability is due to improper verification of digital signatures for software images. An attacker could exploit this vulnerability by loading an unsigned software image on an affected device. A successful exploit could allow the attacker to boot a malicious software image. Note: The fix for this vulnerability requires a BIOS upgrade as part of the software upgrade. For additional information, see the Details section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-sig-verif
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS | ||
| Cisco NX-OS | =13.1<13.2(1l)=Prior to 13.1<13.2(1l) | 13.2(1l) 13.2(1l) |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190306-nxos-sig-verif?
The severity of cisco-sa-20190306-nxos-sig-verif is high due to the potential for an authenticated attacker to install malicious software.
How do I fix cisco-sa-20190306-nxos-sig-verif?
To fix cisco-sa-20190306-nxos-sig-verif, upgrade to the fixed releases of Cisco NX-OS Software that address this vulnerability.
What causes the vulnerability cisco-sa-20190306-nxos-sig-verif?
The vulnerability cisco-sa-20190306-nxos-sig-verif is caused by improper verification of digitally signed software images.
Who is affected by cisco-sa-20190306-nxos-sig-verif?
Administrators using vulnerable versions of Cisco NX-OS Software are affected by cisco-sa-20190306-nxos-sig-verif.
Can cisco-sa-20190306-nxos-sig-verif be exploited remotely?
No, cisco-sa-20190306-nxos-sig-verif requires local access with administrator-level credentials to be exploited.
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