# CVE-2021-0298: Junos OS Evolved: PTX10003, PTX10008: picd core while executing the "show chassis pic" command under certain conditions

> An attacker can cause a denial of service by triggering a race condition in the picd daemon via the show chassis pic command on Juniper PTX routers.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-wpp7-x3r8-v7f8

## What is CVE-2021-0298?

CVE-2021-0298 is a medium-severity vulnerability in Juniper Junos Os Evolved, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A Race Condition in the 'show chassis pic' command in Juniper Networks Junos OS Evolved may allow an attacker to crash the port interface concentrator daemon (picd) process on the FPC, if the command is executed coincident with other system events outside the attacker's control, leading to a Denial of Service (DoS) condition. Continued execution of the CLI command, under precise conditions, could create a sustained Denial of Service (DoS) condition. This issue affects all Juniper Networks Junos OS Evolved versions prior to 20.1R2-EVO on PTX10003 and PTX10008 platforms. Junos OS is not affected by this vulnerability.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2021-0298?

It affects 1 product.


Products: Juniper Junos Os Evolved.

## How do I fix CVE-2021-0298?

No fix has been published for CVE-2021-0298 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-0298 being exploited?

There is no known exploitation of CVE-2021-0298 in the wild and no public exploit code.

## Other vulnerabilities in Juniper Junos Os Evolved

- [CVE-2026-21902](https://insights.sbomify.com/CVE-2026-21902/): Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root (critical 9.3)
- [CVE-2023-28983](https://insights.sbomify.com/CVE-2023-28983/): Junos OS Evolved: Shell Injection vulnerability in the gNOI server (high 8.8)
- [CVE-2025-21599](https://insights.sbomify.com/CVE-2025-21599/): Denial of service in Junos OS Evolved (high 8.7)
- [CVE-2024-47502](https://insights.sbomify.com/CVE-2024-47502/): Junos OS Evolved: TCP session state is not always cleared on the Routing Engine leading to DoS (high 8.7)
- [CVE-2024-39531](https://insights.sbomify.com/CVE-2024-39531/): Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other protocols (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-0298 and fix it if it is affected.

What it is: CVE-2021-0298 is a medium-severity vulnerability in Juniper Junos Os Evolved, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-0298 in the wild and no public exploit code.

Affected product: Juniper Junos Os Evolved. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-0298/ (Markdown: https://insights.sbomify.com/CVE-2021-0298/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-0298
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-0298
- OSV: https://osv.dev/vulnerability/CVE-2021-0298

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-0298/
Summaries are generated and may contain mistakes; the official description above is the record.