# CVE-2018-9995: Auth bypass in n/a

> Remote attackers can bypass authentication on TBK DVR devices by sending a specific cookie header, gaining admin access to view user credentials.

- **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:** 10 Apr 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-mjcj-jjh8-28r2

## What is CVE-2018-9995?

CVE-2018-9995 is a critical authentication bypass vulnerability in n/a, published on 10 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TBK DVR4104 and DVR4216 devices, as well as Novo, CeNova, QSee, Pulnix, XVR 5 in 1, Securus, Night OWL, DVR Login, HVR Login, and MDVR Login, which run re-branded versions of the original TBK DVR4104 and DVR4216 series, allow remote attackers to bypass authentication via a "Cookie: uid=admin" header, as demonstrated by a device.rsp?opt=user&cmd=list request that provides credentials within JSON data in a response.

## Which versions are affected by CVE-2018-9995?

It affects 2 products.


Products: Tbkvision Tbk-Dvr4104 Firmware, Tbkvision Tbk-Dvr4216 Firmware.

## How do I fix CVE-2018-9995?

No fix has been published for CVE-2018-9995 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-9995 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-9995 exists.

Public exploit code:

- (CVE-2018-9995) Get DVR Credentials (github_poc): https://github.com/ezelf/CVE-2018-9995_dvr_credentials
- DVR-Exploiter a Bash Script Program Exploit The DVR's Based on CVE-2018-9995 (github_poc): https://github.com/Cyb0r9/DVR-Exploiter
- POC of CVE-2018-9995 written in Rust. (github_poc): https://github.com/0xDamian/CVE-2018-9995-rs
- Simple python3 script to automate CVE-2018-9995 (github_poc): https://github.com/X3RX3SSec/DVR_Sploit
- CVE-2018-9995_Batch_scanning_exp (github_poc): https://github.com/zzh217/CVE-2018-9995_Batch_scanning_exp
- https://github.com/kienquoc102/CVE-2018-9995-2 (github_poc): https://github.com/kienquoc102/CVE-2018-9995-2

## Other vulnerabilities in n/a

- [CVE-2018-10676](https://insights.sbomify.com/CVE-2018-10676/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-9995 and fix it if it is affected.

What it is: CVE-2018-9995 is a critical authentication bypass vulnerability in n/a, published on 10 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-9995 exists.

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-2018-9995/ (Markdown: https://insights.sbomify.com/CVE-2018-9995/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-9995
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-9995
- OSV: https://osv.dev/vulnerability/CVE-2018-9995

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-9995/
Summaries are generated and may contain mistakes; the official description above is the record.