# CVE-2024-20343: Cisco IOS XR Software CLI Arbitrary File Read Vulnerability

> Authenticated local attackers can read arbitrary files on the underlying Linux OS via improper CLI argument validation in Cisco IOS XR.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **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:** 11 Sep 2024
- **Updated:** 11 Sep 2024
- **Also known as:** GHSA-9m8x-hm95-w858

## What is CVE-2024-20343?

CVE-2024-20343 is a medium-severity path traversal vulnerability in Cisco Ios Xr, published on 11 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to read any file in the file system of the underlying Linux operating system. The attacker must have valid credentials on the affected device.

This vulnerability is due to incorrect validation of the arguments that are passed to a specific CLI command. An attacker could exploit this vulnerability by logging in to an affected device with low-privileged credentials and using the affected command. A successful exploit could allow the attacker access files in read-only mode on the Linux file system.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2024-20343?

It affects 1 product.


Products: Cisco Ios Xr.

## How do I fix CVE-2024-20343?

No fix has been published for CVE-2024-20343 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-20343 being exploited?

There is no known exploitation of CVE-2024-20343 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios Xr

- [CVE-2020-3118](https://insights.sbomify.com/CVE-2020-3118/): Cisco IOS XR Software Discovery Protocol Format String (high 8.8, exploited in the wild)
- [CVE-2020-3569](https://insights.sbomify.com/CVE-2020-3569/): Cisco IOS XR Software DVMRP Memory Exhaustion (high 8.6, exploited in the wild)
- [CVE-2020-3566](https://insights.sbomify.com/CVE-2020-3566/): Cisco IOS XR Software DVMRP Memory Exhaustion (high 8.6, exploited in the wild)
- [CVE-2010-3035](https://insights.sbomify.com/CVE-2010-3035/): Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service (high 7.5, exploited in the wild)
- [CVE-2022-20821](https://insights.sbomify.com/CVE-2022-20821/): Cisco IOS XR Open Port (medium 6.5, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-20343 and fix it if it is affected.

What it is: CVE-2024-20343 is a medium-severity path traversal vulnerability in Cisco Ios Xr, published on 11 Sep 2024. 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-2024-20343 in the wild and no public exploit code.

Affected product: Cisco Ios Xr. 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-2024-20343/ (Markdown: https://insights.sbomify.com/CVE-2024-20343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-20343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-20343
- OSV: https://osv.dev/vulnerability/CVE-2024-20343

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-20343/
Summaries are generated and may contain mistakes; the official description above is the record.