# CVE-2016-9099: Open redirect in ASG

> Remote attackers can redirect users to malicious sites via crafted management console URLs, facilitating phishing attacks against Symantec ASG and ProxySG users.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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:** No
- **Published:** 11 May 2017
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-r27c-c98m-6x4q

## What is CVE-2016-9099?

CVE-2016-9099 is a medium-severity vulnerability in Symantec Corporation ASG, published on 11 May 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

Symantec Advanced Secure Gateway (ASG) 6.6, ASG 6.7 prior to 6.7.2.1, ProxySG 6.5 prior to 6.5.10.6, ProxySG 6.6, and ProxySG 6.7 prior to 6.7.2.1 are susceptible to an open redirection vulnerability. A remote attacker can use a crafted management console URL in a phishing attack to redirect the target user to a malicious web site.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2016-9099?

It affects 2 products.


Products: Broadcom Advanced Secure Gateway, Broadcom Symantec Proxysg.

## How do I fix CVE-2016-9099?

No fix has been published for CVE-2016-9099 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-9099 being exploited?

There is no known exploitation of CVE-2016-9099 in the wild and no public exploit code.

## Other vulnerabilities in Symantec Corporation ASG

- [CVE-2023-23952](https://insights.sbomify.com/CVE-2023-23952/): Command injection in Advanced Secure Gateway, Content Analysis (critical 9.8)
- [CVE-2018-5241](https://insights.sbomify.com/CVE-2018-5241/): Auth bypass in Advanced Secure Gateway (ASG) (critical 9.8)
- [CVE-2021-46825](https://insights.sbomify.com/CVE-2021-46825/): Other in Advance Secure Gateway and ProxySG (critical 9.1)
- [CVE-2023-23955](https://insights.sbomify.com/CVE-2023-23955/): Server-side request forgery in Advanced Secure Gateway, Content Analysis (high 8.1)
- [CVE-2023-23953](https://insights.sbomify.com/CVE-2023-23953/): Privilege escalation in Advanced Secure Gateway, Content Analysis (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-9099 and fix it if it is affected.

What it is: CVE-2016-9099 is a medium-severity vulnerability in Symantec Corporation ASG, published on 11 May 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-2016-9099 in the wild and no public exploit code.

Affected product: Symantec Corporation ASG. 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-2016-9099/ (Markdown: https://insights.sbomify.com/CVE-2016-9099/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-9099
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-9099
- OSV: https://osv.dev/vulnerability/CVE-2016-9099

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-9099/
Summaries are generated and may contain mistakes; the official description above is the record.