# CVE-2019-1763: Cisco IP Phone 8800 Series Authorization Bypass Vulnerability

> Unauthenticated remote attackers can bypass authorization and cause denial of service on Cisco IP Phones via crafted URLs in the web management interface.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 22 Mar 2019
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-p8vp-w9wf-97hp

## What is CVE-2019-1763?

CVE-2019-1763 is a high-severity authentication bypass vulnerability in Cisco IP Conference Phone 8832 and the rest of the IP Phone 8800 Series, published on 22 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to bypass authorization, access critical services, and cause a denial of service (DoS) condition. The vulnerability exists because the software fails to sanitize URLs before it handles requests. An attacker could exploit this vulnerability by submitting a crafted URL. A successful exploit could allow the attacker to gain unauthorized access to critical services and cause a DoS condition. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 11.0(5) for Wireless IP Phone 8821 and 8821-EX; and 12.5(1)SR1 for the IP Conference Phone 8832 and the rest of the IP Phone 8800 Series. Cisco IP Conference Phone 8831 is not affected.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2019-1763?

It affects 4 products.


Products: Cisco Ip Conference Phone 8832 Firmware, Cisco Ip Phone 8800 Firmware, Cisco Ip Phone 8821-Ex Firmware, Cisco Ip Phone 8821 Firmware.

## How do I fix CVE-2019-1763?

No fix has been published for CVE-2019-1763 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1763 being exploited?

There is no known exploitation of CVE-2019-1763 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IP Conference Phone 8832 and the rest of the IP Phone 8800 Series

- [CVE-2019-1764](https://insights.sbomify.com/CVE-2019-1764/): Cisco IP Phone 8800 Series Cross-Site Request Forgery Vulnerability (high 8.1)
- [CVE-2019-1765](https://insights.sbomify.com/CVE-2019-1765/): Cisco IP Phone 8800 Series Path Traversal Vulnerability (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1763 and fix it if it is affected.

What it is: CVE-2019-1763 is a high-severity authentication bypass vulnerability in Cisco IP Conference Phone 8832 and the rest of the IP Phone 8800 Series, published on 22 Mar 2019. 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-2019-1763 in the wild and no public exploit code.

Affected product: Cisco IP Conference Phone 8832 and the rest of the IP Phone 8800 Series. 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-2019-1763/ (Markdown: https://insights.sbomify.com/CVE-2019-1763/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1763
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1763
- OSV: https://osv.dev/vulnerability/CVE-2019-1763

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-1763/
Summaries are generated and may contain mistakes; the official description above is the record.