# CVE-2021-35236: Missing Secure Flag From SSL Cookie

> Attackers can intercept session cookies sent over unencrypted HTTP connections due to missing Secure flags in Kiwi Syslog Server.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Oct 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-7fqp-g334-ghhw

## What is CVE-2021-35236?

CVE-2021-35236 is a low-severity vulnerability in SolarWinds Kiwi Syslog Server, published on 27 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Secure flag is not set in the SSL Cookie of Kiwi Syslog Server 9.7.2 and previous versions. The Secure attribute tells the browser to only send the cookie if the request is being sent over a secure channel such as HTTPS. This will help protect the cookie from being passed over unencrypted requests. If the application can be accessed over both HTTP, there is a potential for the cookie can be sent in clear text.

Weakness: CWE-311 (Missing Encryption of Sensitive Data), CWE-614 (Sensitive Cookie in HTTPS Session Without 'Secure' Attribute)

## Which versions are affected by CVE-2021-35236?

It affects 1 product.


Products: Solarwinds Kiwi Syslog Server.

## How do I fix CVE-2021-35236?

No fix has been published for CVE-2021-35236 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35236 being exploited?

There is no known exploitation of CVE-2021-35236 in the wild and no public exploit code.

## Other vulnerabilities in SolarWinds Kiwi Syslog Server

- [CVE-2021-35231](https://insights.sbomify.com/CVE-2021-35231/): Unquoted Path (SMB Login) Vulnerability (medium 6.7)
- [CVE-2021-35233](https://insights.sbomify.com/CVE-2021-35233/): HTTP TRACK & TRACE Methods Enabled (medium 5.3)
- [CVE-2021-35235](https://insights.sbomify.com/CVE-2021-35235/): ASP.NET Debug Feature Enabled (medium 5.3)
- [CVE-2021-35237](https://insights.sbomify.com/CVE-2021-35237/): Clickjacking Vulnerability (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35236 and fix it if it is affected.

What it is: CVE-2021-35236 is a low-severity vulnerability in SolarWinds Kiwi Syslog Server, published on 27 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-35236 in the wild and no public exploit code.

Affected product: SolarWinds Kiwi Syslog Server. 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-2021-35236/ (Markdown: https://insights.sbomify.com/CVE-2021-35236/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35236
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35236
- OSV: https://osv.dev/vulnerability/CVE-2021-35236

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35236/
Summaries are generated and may contain mistakes; the official description above is the record.