# CVE-2017-7927: Auth bypass in Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras

> Attackers can bypass authentication on Dahua cameras and recorders by using password hashes instead of actual passwords, gaining unauthorized access.

- **Severity:** High 7.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 May 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-c2vq-prj2-mrqc

## What is CVE-2017-7927?

CVE-2017-7927 is a high-severity authentication bypass vulnerability in Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras, published on 6 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Use of Password Hash Instead of Password for Authentication issue was discovered in Dahua DH-IPC-HDBW23A0RN-ZS, DH-IPC-HDBW13A0SN, DH-IPC-HDW1XXX, DH-IPC-HDW2XXX, DH-IPC-HDW4XXX, DH-IPC-HFW1XXX, DH-IPC-HFW2XXX, DH-IPC-HFW4XXX, DH-SD6CXX, DH-NVR1XXX, DH-HCVR4XXX, DH-HCVR5XXX, DHI-HCVR51A04HE-S3, DHI-HCVR51A08HE-S3, and DHI-HCVR58A32S-S2 devices. The use of password hash instead of password for authentication vulnerability was identified, which could allow a malicious user to bypass authentication without obtaining the actual password.

Weakness: CWE-798 (Use of Hard-coded Credentials), CWE-836 (Use of Password Hash Instead of Password for Authentication)

## Which versions are affected by CVE-2017-7927?

It affects 15 products.


Products: Dahuasecurity Dh-Hcvr4xxx Firmware, Dahuasecurity Dh-Hcvr5xxx Firmware, Dahuasecurity Dh-Ipc-Hdbw13a0sn Firmware, Dahuasecurity Dh-Ipc-Hdbw23a0rn-Zs Firmware, Dahuasecurity Dh-Ipc-Hdw1xxx Firmware, Dahuasecurity Dh-Ipc-Hdw2xxx Firmware, Dahuasecurity Dh-Ipc-Hdw4xxx Firmware, Dahuasecurity Dh-Ipc-Hfw1xxx Firmware, Dahuasecurity Dh-Ipc-Hfw2xxx Firmware, Dahuasecurity Dh-Ipc-Hfw4xxx Firmware, Dahuasecurity Dh-Nvr1xxx Firmware, Dahuasecurity Dh-Sd6cxx Firmware, Dahuasecurity Dhi-Hcvr51a04he-S3 Firmware, Dahuasecurity Dhi-Hcvr51a08he-S3 Firmware, Dahuasecurity Dhi-Hcvr58a32s-S2 Firmware.

## How do I fix CVE-2017-7927?

No fix has been published for CVE-2017-7927 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-7927 being exploited?

There is no known exploitation of CVE-2017-7927 in the wild and no public exploit code.

## Other vulnerabilities in Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras

- [CVE-2017-7925](https://insights.sbomify.com/CVE-2017-7925/): Hardcoded credentials in Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-7927 and fix it if it is affected.

What it is: CVE-2017-7927 is a high-severity authentication bypass vulnerability in Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras, published on 6 May 2017. 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-2017-7927 in the wild and no public exploit code.

Affected product: Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras. 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-2017-7927/ (Markdown: https://insights.sbomify.com/CVE-2017-7927/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-7927
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-7927
- OSV: https://osv.dev/vulnerability/CVE-2017-7927

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-7927/
Summaries are generated and may contain mistakes; the official description above is the record.