# CVE-2018-19443: Session Fixation in Tryton

> Man-in-the-middle attackers can steal user session tokens because the Tryton client sends them in cleartext during failed bus connections.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Nov 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-32w7-9whp-cjp9, PYSEC-2018-77, UBUNTU-CVE-2018-19443

## What is CVE-2018-19443?

CVE-2018-19443 is a medium-severity vulnerability in n/a, published on 22 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The client in Tryton 5.x before 5.0.1 tries to make a connection to the bus in cleartext instead of encrypted under certain circumstances in bus.py and jsonrpc.py. This connection attempt fails, but it contains in the header the current session of the user. This session could then be stolen by a man-in-the-middle.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2018-19443?

3 open source packages ship an affected version, including tryton. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `tryton` | PyPI | From 5.0.0 | 5.0.1 |
| `tryton` | PyPI | From 5.0.0 | 5.0.1 |
| `tryton` | PyPI | From 5.0.0 | 5.0.1 |

Products: Tryton Tryton.

## How do I fix CVE-2018-19443?

Upgrade tryton to 5.0.1 or later.

## Is CVE-2018-19443 being exploited?

There is no known exploitation of CVE-2018-19443 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2014-6633](https://insights.sbomify.com/CVE-2014-6633/): Tryton vulnerable to arbitrary command execution (high 8.8)
- [CVE-2013-4510](https://insights.sbomify.com/CVE-2013-4510/): Tryton Directory Traversal vulnerability (high 7.8)
- [CVE-2017-0360](https://insights.sbomify.com/CVE-2017-0360/): Tryton Information Disclosure Vulnerability (medium 5.3)
- [CVE-2016-1241](https://insights.sbomify.com/CVE-2016-1241/): Tryton allows users to read the hashed password (medium 5.3)
- [CVE-2016-1242](https://insights.sbomify.com/CVE-2016-1242/): Tryton allow authenticated users with certain permissions to read arbitrary files via the name parameter (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-19443 and fix it if it is affected.

What it is: CVE-2018-19443 is a medium-severity vulnerability in n/a, published on 22 Nov 2018. 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-2018-19443 in the wild and no public exploit code.

Affected packages and fixed versions:
- tryton (PyPI): affected from 5.0.0; fixed in 5.0.1
- tryton (PyPI): affected from 5.0.0; fixed in 5.0.1
- tryton (PyPI): affected from 5.0.0; fixed in 5.0.1

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-2018-19443/ (Markdown: https://insights.sbomify.com/CVE-2018-19443/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-19443
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-19443
- OSV: https://osv.dev/vulnerability/CVE-2018-19443

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-19443/
Summaries are generated and may contain mistakes; the official description above is the record.