# What is CVE-2019-1615?

> CVE-2019-1615 is a medium-severity flaw (CVSS 6.7) in NX-OS from Cisco, published on 11 March 2019. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.2%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.edgeprotect.io/what-is/cve-2019-1615

## At a glance

- **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle.
- **EdgeProtect risk score:** 20 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 6.7 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 0.2% (latest exploit-likelihood forecast)
- **Published:** 11 March 2019
- **Record last updated:** 9 October 2019
- **Main product:** NX-OS from Cisco
- **Affected products:** 44

## What is CVE-2019-1615? In plain terms

An attacker has to be already on the device with an administrator account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### The 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 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 kind of flaw is it?

- CWE-347: Improper Verification of Cryptographic Signature

### How an attack on it works

- Where an attacker can be: Already on the device
- How hard it is to pull off: Easy: no special conditions
- Login needed first: An administrator account
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can read data, change data and take it offline

Severity vector: `CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`

## Is CVE-2019-1615 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.2%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 0.2%, 0.2%, 0.2%, 0.2%, 0.2%, 0.2%, 0.2%.

### Timeline

- 11 March 2019: Published
- 9 October 2019: Record last updated

### How EdgeProtect ranks it

CVE-2019-1615 scores **20 out of 100 (Low)**, with the action "Monitor".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: key context
- Real threat activity around it: key context

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2019-1615?

The published record lists 44 products.

- [NX-OS](https://www.edgeprotect.io/product/cisco/nx-os) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Operating system): 7.0(3)i7(3), 7.0(3)i7(5), 9.2(1), 12.3(0.97)
- [9432pq](https://www.edgeprotect.io/product/cisco/9432pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [9536pq](https://www.edgeprotect.io/product/cisco/9536pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [9636pq](https://www.edgeprotect.io/product/cisco/9636pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [9736pq](https://www.edgeprotect.io/product/cisco/9736pq) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N3k-C31128pq-10ge](https://www.edgeprotect.io/product/cisco/n3k-c31128pq-10ge) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N3k-C3132c-Z](https://www.edgeprotect.io/product/cisco/n3k-c3132c-z) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N3k-C3164q-40ge](https://www.edgeprotect.io/product/cisco/n3k-c3164q-40ge) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N3k-C3264q](https://www.edgeprotect.io/product/cisco/n3k-c3264q) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9432c-S](https://www.edgeprotect.io/product/cisco/n9k-x9432c-s) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9464px](https://www.edgeprotect.io/product/cisco/n9k-x9464px) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9464tx2](https://www.edgeprotect.io/product/cisco/n9k-x9464tx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9564px](https://www.edgeprotect.io/product/cisco/n9k-x9564px) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9564tx](https://www.edgeprotect.io/product/cisco/n9k-x9564tx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9636c-R](https://www.edgeprotect.io/product/cisco/n9k-x9636c-r) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9636c-Rx](https://www.edgeprotect.io/product/cisco/n9k-x9636c-rx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X97160yc-EX](https://www.edgeprotect.io/product/cisco/n9k-x97160yc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9732c-EX](https://www.edgeprotect.io/product/cisco/n9k-x9732c-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9732c-Fx](https://www.edgeprotect.io/product/cisco/n9k-x9732c-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9736c-EX](https://www.edgeprotect.io/product/cisco/n9k-x9736c-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9736c-Fx](https://www.edgeprotect.io/product/cisco/n9k-x9736c-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [N9k-X9788tc-Fx](https://www.edgeprotect.io/product/cisco/n9k-x9788tc-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 92160yc-X](https://www.edgeprotect.io/product/cisco/nexus_92160yc-x) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 92300yc](https://www.edgeprotect.io/product/cisco/nexus_92300yc) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 92304qc](https://www.edgeprotect.io/product/cisco/nexus_92304qc) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9236c](https://www.edgeprotect.io/product/cisco/nexus_9236c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9272q](https://www.edgeprotect.io/product/cisco/nexus_9272q) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93108tc-EX](https://www.edgeprotect.io/product/cisco/nexus_93108tc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93108tc-Fx](https://www.edgeprotect.io/product/cisco/nexus_93108tc-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93120tx](https://www.edgeprotect.io/product/cisco/nexus_93120tx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9316d-Gx](https://www.edgeprotect.io/product/cisco/nexus_9316d-gx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93180lc-EX](https://www.edgeprotect.io/product/cisco/nexus_93180lc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93180yc-EX](https://www.edgeprotect.io/product/cisco/nexus_93180yc-ex) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93180yc-Fx](https://www.edgeprotect.io/product/cisco/nexus_93180yc-fx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93240yc-Fx2](https://www.edgeprotect.io/product/cisco/nexus_93240yc-fx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9332c](https://www.edgeprotect.io/product/cisco/nexus_9332c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9336c-Fx2](https://www.edgeprotect.io/product/cisco/nexus_9336c-fx2) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9348gc-Fxp](https://www.edgeprotect.io/product/cisco/nexus_9348gc-fxp) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 93600cd-Gx](https://www.edgeprotect.io/product/cisco/nexus_93600cd-gx) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9364c](https://www.edgeprotect.io/product/cisco/nexus_9364c) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9504](https://www.edgeprotect.io/product/cisco/nexus_9504) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9508](https://www.edgeprotect.io/product/cisco/nexus_9508) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [Nexus 9516](https://www.edgeprotect.io/product/cisco/nexus_9516) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified
- [X9636q-R](https://www.edgeprotect.io/product/cisco/x9636q-r) by [Cisco](https://www.edgeprotect.io/vendors/cisco) (Hardware): version not specified

## How do I fix CVE-2019-1615?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? EdgeProtect can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [tools.cisco.com](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-sig-verif) (Vendor advisory)
- [securityfocus.com](http://www.securityfocus.com/bid/107397) (Third-party advisory, Vulnerability database)

## Questions

### What is CVE-2019-1615?

CVE-2019-1615 is a medium-severity flaw in NX-OS from Cisco, published on 11 March 2019. An attacker has to be already on the device with an administrator account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### How serious is CVE-2019-1615?

It scores 6.7 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2019-1615 is 20 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2019-1615 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.2%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2019-1615 affect?

For NX-OS from Cisco: 7.0(3)i7(3), 7.0(3)i7(5), 9.2(1), 12.3(0.97). The record lists 44 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2019-1615?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2019-1615 affect you?

EdgeProtect keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

Start free (no card, nothing to install): https://www.edgeprotect.io/register
Book a demo: https://www.edgeprotect.io/contact