CVE-2019-1809 Cisco NX-OS Software Patch Signature Verification Bypass Vulnerability

What is CVE-2019-1809?

CVE-2019-1809 is a medium-severity vulnerability in Cisco Nx-Os, published on 15 May 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-347

Which versions are affected by CVE-2019-1809?

It affects 1 product.

Products include Cisco Nx-Os.

How do I fix CVE-2019-1809?

No fix has been published for CVE-2019-1809 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-1809 being exploited?

There is no known exploitation of CVE-2019-1809 in the wild and no public exploit code.

Other vulnerabilities in Cisco Nx-Os

• CVE-2024-20399 Cisco NX-OS Command Injection Exploited Medium 6.0
• CVE-2021-1361 Cisco NX-OS Software Unauthenticated Arbitrary File Actions Vulnerability Critical 9.8
• CVE-2018-0301 Memory corruption in Cisco NX-OS unknown Critical 9.8
• CVE-2016-1453 Memory corruption in n/a Critical 9.8
• CVE-2016-1341 Hardcoded credentials in n/a Critical 9.8

All Cisco Nx-Os vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7g3p-mpgp-q5c5.