# CVE-2019-11395: Memory corruption in n/a

> Remote attackers can execute arbitrary code on MailCarrier mail servers via buffer overflows in SMTP and POP3 protocols.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7v86-hv29-pw56

## What is CVE-2019-11395?

CVE-2019-11395 is a critical memory corruption vulnerability in n/a, published on 21 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A buffer overflow in MailCarrier 2.51 allows remote attackers to execute arbitrary code via a long string, as demonstrated by SMTP RCPT TO, POP3 USER, POP3 LIST, POP3 TOP, or POP3 RETR.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2019-11395?

It affects 1 product.


Products: Tabslab Mailcarrier.

## How do I fix CVE-2019-11395?

No fix has been published for CVE-2019-11395 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-11395 being exploited?

There is no known exploitation of CVE-2019-11395 in the wild and no public exploit code.

Public exploit code:

- MailCarrier 2.51 - POP3 'USER' Buffer Overflow (github_poc): https://github.com/RedAlien00/CVE-2019-11395
- A exploit for the CVE-2019-11395 vulnerability in the MailCarrier 2.51 email application, enabling remote code execution. (github_poc): https://github.com/caioprince/CVE-2019-11395
- Proof of concept with the academic purpose to understand the Buffer Overflow vulnerability using as background the CVE-2019-11395 (github_poc): https://github.com/RafaelBicas/CVE-2019-11395

## Other vulnerabilities in n/a

- [CVE-2019-11682](https://insights.sbomify.com/CVE-2019-11682/): Memory corruption in n/a (critical 9.8)
- [CVE-2019-25646](https://insights.sbomify.com/CVE-2019-25646/): Tabs Mail Carrier 2.5.1 Buffer Overflow via MAIL FROM (critical 9.3)
- [CVE-2019-25364](https://insights.sbomify.com/CVE-2019-25364/): Win10 MailCarrier 2.51 - 'POP3 User' Remote Buffer Overflow (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-11395 and fix it if it is affected.

What it is: CVE-2019-11395 is a critical memory corruption vulnerability in n/a, published on 21 Apr 2019. 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-2019-11395 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-2019-11395/ (Markdown: https://insights.sbomify.com/CVE-2019-11395/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-11395
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-11395
- OSV: https://osv.dev/vulnerability/CVE-2019-11395

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-11395/
Summaries are generated and may contain mistakes; the official description above is the record.