# CVE-2017-8871: Denial of service in n/a

> Remote attackers can cause a denial of service via infinite loop and CPU consumption in libcroco by submitting a crafted CSS file.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:** 12 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-8871, AZL-44802, GHSA-xxqh-r526-fmp5, UBUNTU-CVE-2017-8871

## What is CVE-2017-8871?

CVE-2017-8871 is a medium-severity denial of service vulnerability in Opensuse Leap, published on 12 Jun 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

The cr_parser_parse_selector_core function in cr-parser.c in libcroco 0.6.12 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a crafted CSS file.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2017-8871?

It affects 2 products.


Products: Gnome Libcroco, Opensuse Leap.

## How do I fix CVE-2017-8871?

Upgrade to a fixed version.

## Is CVE-2017-8871 being exploited?

There is no known exploitation of CVE-2017-8871 in the wild and no public exploit code.

Public exploit code:

- libcroco 0.6.12 - Denial of Service (exploitdb)

## Other vulnerabilities in Opensuse Leap

- [CVE-2017-7961](https://insights.sbomify.com/CVE-2017-7961/): Integer overflow in n/a (high 7.8)
- [CVE-2020-12825](https://insights.sbomify.com/CVE-2020-12825/): Denial of service in n/a (high 7.1)
- [CVE-2017-8834](https://insights.sbomify.com/CVE-2017-8834/): Denial of service in n/a (medium 6.5)
- [CVE-2017-7960](https://insights.sbomify.com/CVE-2017-7960/): Memory corruption in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-8871 and fix it if it is affected.

What it is: CVE-2017-8871 is a medium-severity denial of service vulnerability in Opensuse Leap, published on 12 Jun 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-2017-8871 in the wild and no public exploit code.

Affected product: Opensuse Leap. 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-2017-8871/ (Markdown: https://insights.sbomify.com/CVE-2017-8871/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-8871
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-8871
- OSV: https://osv.dev/vulnerability/CVE-2017-8871

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-8871/
Summaries are generated and may contain mistakes; the official description above is the record.