# CVE-2015-8234: OpenStack Glance Signature Verification Bypass

> Remote attackers can bypass image signature verification in OpenStack Glance by exploiting MD5 collisions, allowing unsigned images to be accepted.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 29 Mar 2017
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-8234, GHSA-wmhw-fvg9-87fc, PYSEC-2017-143

## What is CVE-2015-8234?

CVE-2015-8234 is a medium-severity vulnerability in n/a, published on 29 Mar 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The image signature algorithm in OpenStack Glance 11.0.0 allows remote attackers to bypass the signature verification process via a crafted image, which triggers an MD5 collision.

Weakness: CWE-310

## Which versions are affected by CVE-2015-8234?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `glance` | PyPI | All versions to 11.0.0 | None |
| `glance` | PyPI | All versions to 11.0.0 | None |
| `glance` | PyPI | All versions to 11.0.0 | None |

Products: Openstack Glance.

## How do I fix CVE-2015-8234?

No fix has been published for CVE-2015-8234 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-8234 being exploited?

There is no known exploitation of CVE-2015-8234 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-7200](https://insights.sbomify.com/CVE-2017-7200/): OpenStack Glance Server-Side Request Forgery (SSRF) (medium 5.8)
- [CVE-2026-34881](https://insights.sbomify.com/CVE-2026-34881/): OpenStack Glance is affected by Server-Side Request Forgery (SSRF) (medium 5.0)
- [CVE-2016-8611](https://insights.sbomify.com/CVE-2016-8611/): Denial of service in openstack-glance (medium 4.3)
- [CVE-2015-3289](https://insights.sbomify.com/CVE-2015-3289/): Denial of service in n/a (medium 4.0)
- [CVE-2015-5163](https://insights.sbomify.com/CVE-2015-5163/): OpenStack Image Service (Glance) allows remote authenticated users to read arbitrary file (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-8234 and fix it if it is affected.

What it is: CVE-2015-8234 is a medium-severity vulnerability in n/a, published on 29 Mar 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2015-8234 in the wild and no public exploit code.

Affected packages and fixed versions:
- glance (PyPI): affected all versions up to 11.0.0; no fix listed
- glance (PyPI): affected all versions up to 11.0.0; no fix listed
- glance (PyPI): affected all versions up to 11.0.0; 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-2015-8234/ (Markdown: https://insights.sbomify.com/CVE-2015-8234/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-8234
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-8234
- OSV: https://osv.dev/vulnerability/CVE-2015-8234

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-8234/
Summaries are generated and may contain mistakes; the official description above is the record.