CVE-2019-1809
Medium
Description
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 patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.
SeverityMedium
CVSS6.7
Exploit probability—
Product
Cisco Nx-os
PublishedMay 15, 2019
First seenMay 15, 2019
Weakness typeCWE-347CWE-347
How to fix
Update
- cisco nx-os8.1\(1a\), 8.3\(1\), 7.3\(3\)d1\(1\), 8.2\(3\), 3.2\(3k\) or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco nx-os | 7.3 ≤ v < 8.1\(1a\), 8.2 ≤ v < 8.3\(1\), 7.2 ≤ v < 7.3\(3\)d1\(1\), 8.0 ≤ v < 8.2\(3\), 3.1 ≤ v < 3.2\(3k\) | 8.1\(1a\), 8.3\(1\), 7.3\(3\)d1\(1\), 8.2\(3\), 3.2\(3k\) |
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