# CVE-2017-14176: Bazaar allows remote attackers to execute arbitrary commands via a bzr+ssh URL with initial dash character in hostname

> Remote attackers can execute arbitrary commands via a crafted bzr+ssh URL when Subprocess SSH is enabled in Bazaar.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 27 Nov 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-14176, DSA-4052-1, GHSA-jjxg-hpm7-g95f, PYSEC-2017-149, SUSE-SU-2018:1489-1, UBUNTU-CVE-2017-14176, USN-3411-1

## What is CVE-2017-14176?

CVE-2017-14176 is a high-severity command injection vulnerability in Canonical Ubuntu Linux, published on 27 Nov 2017. 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

Bazaar through 2.7.0, when Subprocess SSH is used, allows remote attackers to execute arbitrary commands via a bzr+ssh URL with an initial dash character in the hostname, a related issue to CVE-2017-9800, CVE-2017-12836, CVE-2017-12976, CVE-2017-16228, CVE-2017-1000116, and CVE-2017-1000117.

## Which versions are affected by CVE-2017-14176?

3 open source packages ship an affected version, including bzr. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `bzr` | PyPI | All versions | None |
| `bzr` | PyPI | All versions to 2.7.0 | None |
| `bzr` | PyPI | All versions to 2.7.0 | None |
| `bzr` | SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 1.8-3.5.1 |

Products: Canonical Bazaar, Canonical Ubuntu Linux, Debian Debian Linux.

## How do I fix CVE-2017-14176?

Apply the vendor's patch.

## Is CVE-2017-14176 being exploited?

There is no known exploitation of CVE-2017-14176 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-14176 and fix it if it is affected.

What it is: CVE-2017-14176 is a high-severity command injection vulnerability in Canonical Ubuntu Linux, published on 27 Nov 2017. 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-2017-14176 in the wild and no public exploit code.

Affected packages and fixed versions:
- bzr (PyPI): affected all versions; no fix listed
- bzr (PyPI): affected all versions up to 2.7.0; no fix listed
- bzr (PyPI): affected all versions up to 2.7.0; no fix listed

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-2017-14176/ (Markdown: https://insights.sbomify.com/CVE-2017-14176/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-14176
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-14176
- OSV: https://osv.dev/vulnerability/CVE-2017-14176

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-14176/
Summaries are generated and may contain mistakes; the official description above is the record.