# CVE-2018-10252: Auth bypass in n/a

> Attackers can hijack admin sessions by predicting time-based cookies, gaining full control to create backdoor SSIDs on Actiontec devices.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:H/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:** 14 May 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-3fww-pf4h-wv5m

## What is CVE-2018-10252?

CVE-2018-10252 is a high-severity authentication bypass vulnerability in n/a, published on 14 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on Actiontec WCB6200Q before 1.1.10.20a devices. The admin login session cookie is insecurely generated making admin session hijacking possible. When an admin logs in, a session cookie is generated using the time of day rounded to 10ms. Since the web server returns its current time of day in responses, it is possible to step backward through possible session values until a working one is found. Once a working session ID is found, an attacker then has admin control of the device and can add a secondary SSID to create a backdoor to the network.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2018-10252?

It affects 1 product.


Products: Actiontec Wcb6200q Firmware.

## How do I fix CVE-2018-10252?

No fix has been published for CVE-2018-10252 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-10252 being exploited?

There is no known exploitation of CVE-2018-10252 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-6142](https://insights.sbomify.com/CVE-2024-6142/): Actiontec WCB6200Q uh_tcp_recv_content Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-6143](https://insights.sbomify.com/CVE-2024-6143/): Actiontec WCB6200Q uh_tcp_recv_header Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-6144](https://insights.sbomify.com/CVE-2024-6144/): Actiontec WCB6200Q Multipart Boundary Stack-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-6145](https://insights.sbomify.com/CVE-2024-6145/): Actiontec WCB6200Q Cookie Format String Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-6146](https://insights.sbomify.com/CVE-2024-6146/): Actiontec WCB6200Q uh_get_postdata_withupload Stack-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-10252 and fix it if it is affected.

What it is: CVE-2018-10252 is a high-severity authentication bypass vulnerability in n/a, published on 14 May 2018. 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-2018-10252 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-2018-10252/ (Markdown: https://insights.sbomify.com/CVE-2018-10252/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-10252
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-10252
- OSV: https://osv.dev/vulnerability/CVE-2018-10252

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-10252/
Summaries are generated and may contain mistakes; the official description above is the record.