# CVE-2021-0296: CTPView: HSTS not being enforced on CTPView server.

> Attackers can perform SSL-stripping or downgrade attacks against Juniper CTPView due to missing HSTS headers, bypassing transport security protections.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-546v-59ph-f93v

## What is CVE-2021-0296?

CVE-2021-0296 is a high-severity vulnerability in Juniper Networks CTPView, published on 19 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Juniper Networks CTPView server is not enforcing HTTP Strict Transport Security (HSTS). HSTS is an optional response header which allows servers to indicate that content from the requested domain will only be served over HTTPS. The lack of HSTS may leave the system vulnerable to downgrade attacks, SSL-stripping man-in-the-middle attacks, and weakens cookie-hijacking protections. This issue affects Juniper Networks CTPView: 7.3 versions prior to 7.3R7; 9.1 versions prior to 9.1R3.

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

## Which versions are affected by CVE-2021-0296?

It affects 1 product.


Products: Juniper Ctpview.

## How do I fix CVE-2021-0296?

No fix has been published for CVE-2021-0296 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-0296 being exploited?

There is no known exploitation of CVE-2021-0296 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-0296 and fix it if it is affected.

What it is: CVE-2021-0296 is a high-severity vulnerability in Juniper Networks CTPView, published on 19 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-0296 in the wild and no public exploit code.

Affected product: Juniper Networks CTPView. 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-2021-0296/ (Markdown: https://insights.sbomify.com/CVE-2021-0296/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-0296
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-0296
- OSV: https://osv.dev/vulnerability/CVE-2021-0296

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-0296/
Summaries are generated and may contain mistakes; the official description above is the record.