# CVE-2018-10355: Weak cryptography in Trend Micro Email Encryption Gateway

> An attacker with database access can recover user passwords due to weak cryptography in Trend Micro Email Encryption Gateway.

- **Severity:** High 7.0 (`CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 23 May 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-49rg-f69p-79rc

## What is CVE-2018-10355?

CVE-2018-10355 is a high-severity vulnerability in Trend Micro Email Encryption Gateway, published on 23 May 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An authentication weakness vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to recover user passwords on vulnerable installations due to a flaw in the DBCrypto class. An attacker must first obtain access to the user database on the target system in order to exploit this vulnerability.

Weakness: CWE-522 (Insufficiently Protected Credentials)

## Which versions are affected by CVE-2018-10355?

It affects 1 product.


Products: Trendmicro Email Encryption Gateway.

## How do I fix CVE-2018-10355?

No fix has been published for CVE-2018-10355 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-10355 being exploited?

There is no known exploitation of CVE-2018-10355 in the wild and no public exploit code.

## Other vulnerabilities in Trend Micro Email Encryption Gateway

- [CVE-2018-6220](https://insights.sbomify.com/CVE-2018-6220/): File upload in Trend Micro Email Encryption Gateway (critical 9.8)
- [CVE-2018-6223](https://insights.sbomify.com/CVE-2018-6223/): Missing authorization in Trend Micro Email Encryption Gateway (critical 9.8)
- [CVE-2018-6228](https://insights.sbomify.com/CVE-2018-6228/): SQL injection in Trend Micro Email Encryption Gateway (critical 9.8)
- [CVE-2018-6229](https://insights.sbomify.com/CVE-2018-6229/): SQL injection in Trend Micro Email Encryption Gateway (critical 9.8)
- [CVE-2016-4351](https://insights.sbomify.com/CVE-2016-4351/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-10355 and fix it if it is affected.

What it is: CVE-2018-10355 is a high-severity vulnerability in Trend Micro Email Encryption Gateway, published on 23 May 2018. 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-2018-10355 in the wild and no public exploit code.

Affected product: Trend Micro Email Encryption Gateway. 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-2018-10355/ (Markdown: https://insights.sbomify.com/CVE-2018-10355/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-10355
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-10355
- OSV: https://osv.dev/vulnerability/CVE-2018-10355

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-10355/
Summaries are generated and may contain mistakes; the official description above is the record.