# CVE-2021-28508: TerminAttr streams IPsec sensitive data in clear text to other authorized users in CVP

> Authorized users can view or modify IPsec traffic due to clear text leakage of sensitive data by the TerminAttr agent in Arista EOS.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 26 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rg8c-f654-9rhg

## What is CVE-2021-28508?

CVE-2021-28508 is a medium-severity vulnerability in Arista EOS, published on 26 May 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

This advisory documents the impact of an internally found vulnerability in Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols. The impact of this vulnerability is that, in certain conditions, TerminAttr might leak IPsec sensitive data in clear text in CVP to other authorized users, which could cause IPsec traffic to be decrypted or modified by other authorized users on the device.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information), CWE-255

## Which versions are affected by CVE-2021-28508?

It affects 2 products.


Products: Arista Eos, Arista Terminattr.

## How do I fix CVE-2021-28508?

No fix has been published for CVE-2021-28508 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28508 being exploited?

There is no known exploitation of CVE-2021-28508 in the wild and no public exploit code.

## Other vulnerabilities in Arista EOS

- [CVE-2026-7473](https://insights.sbomify.com/CVE-2026-7473/): Arista Extensible Operating System Incomplete Comparison with Missing Factors (medium 6.9, exploited in the wild)
- [CVE-2015-8236](https://insights.sbomify.com/CVE-2015-8236/): Privilege escalation in n/a (critical 10.0)
- [CVE-2020-10188](https://insights.sbomify.com/CVE-2020-10188/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-18017](https://insights.sbomify.com/CVE-2017-18017/): Use after free in n/a (critical 9.8)
- [CVE-2017-14491](https://insights.sbomify.com/CVE-2017-14491/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28508 and fix it if it is affected.

What it is: CVE-2021-28508 is a medium-severity vulnerability in Arista EOS, published on 26 May 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-28508 in the wild and no public exploit code.

Affected product: Arista EOS. 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-2021-28508/ (Markdown: https://insights.sbomify.com/CVE-2021-28508/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28508
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28508
- OSV: https://osv.dev/vulnerability/CVE-2021-28508

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28508/
Summaries are generated and may contain mistakes; the official description above is the record.