# CVE-2018-15586: Security feature bypass in n/a

> Attackers can spoof OpenPGP signatures on arbitrary messages via crafted multipart HTML emails, bypassing email integrity checks in Enigmail.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:** Yes
- **Published:** 11 Feb 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-15586, GHSA-wf4h-8hc9-6ccv

## What is CVE-2018-15586?

CVE-2018-15586 is a medium-severity vulnerability in n/a, published on 11 Feb 2019. 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

Enigmail before 2.0.6 is prone to to OpenPGP signatures being spoofed for arbitrary messages using a PGP/INLINE signature wrapped within a specially crafted multipart HTML email.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2018-15586?

It affects 1 product.


Products: Enigmail Enigmail.

## How do I fix CVE-2018-15586?

Upgrade to a fixed version.

## Is CVE-2018-15586 being exploited?

There is no known exploitation of CVE-2018-15586 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2006-5877](https://insights.sbomify.com/CVE-2006-5877/): Denial of service in n/a (high 7.8)
- [CVE-2019-12269](https://insights.sbomify.com/CVE-2019-12269/): Other in n/a (high 7.5)
- [CVE-2018-12019](https://insights.sbomify.com/CVE-2018-12019/): Security feature bypass in n/a (high 7.5)
- [CVE-2019-14664](https://insights.sbomify.com/CVE-2019-14664/): Information disclosure in n/a (medium 6.5)
- [CVE-2007-1264](https://insights.sbomify.com/CVE-2007-1264/): Security feature bypass in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15586 and fix it if it is affected.

What it is: CVE-2018-15586 is a medium-severity vulnerability in n/a, published on 11 Feb 2019. 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-2018-15586 in the wild and no public exploit code.

Affected product: n/a. 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-2018-15586/ (Markdown: https://insights.sbomify.com/CVE-2018-15586/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15586
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15586
- OSV: https://osv.dev/vulnerability/CVE-2018-15586

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15586/
Summaries are generated and may contain mistakes; the official description above is the record.