# CVE-2016-7152: Information disclosure in n/a

> Remote attackers can obtain cleartext data via the HEIST attack by leveraging TCP congestion window information in HTTPS when third-party cookies are enabled.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Sep 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-gj46-mfx7-2vwx, UBUNTU-CVE-2016-7152

## What is CVE-2016-7152?

CVE-2016-7152 is a medium-severity vulnerability in Apple Safari, published on 6 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The HTTPS protocol does not consider the role of the TCP congestion window in providing information about content length, which makes it easier for remote attackers to obtain cleartext data by leveraging a web-browser configuration in which third-party cookies are sent, aka a "HEIST" attack.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2016-7152?

It affects 6 products.


Products: Apple Safari, Google Chrome, Microsoft Edge, Microsoft Internet Explorer, Mozilla Firefox, Opera Opera.

## How do I fix CVE-2016-7152?

No fix has been published for CVE-2016-7152 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-7152 being exploited?

There is no known exploitation of CVE-2016-7152 in the wild and no public exploit code.

## Other vulnerabilities in Apple Safari

- [CVE-2015-5780](https://insights.sbomify.com/CVE-2015-5780/): Security feature bypass in n/a (critical 10.0)
- [CVE-2014-1300](https://insights.sbomify.com/CVE-2014-1300/): Code injection in n/a (critical 10.0)
- [CVE-2014-1303](https://insights.sbomify.com/CVE-2014-1303/): Memory corruption in n/a (critical 10.0)
- [CVE-2010-1120](https://insights.sbomify.com/CVE-2010-1120/): Code injection in n/a (critical 10.0)
- [CVE-2009-0137](https://insights.sbomify.com/CVE-2009-0137/): Cross-site scripting in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-7152 and fix it if it is affected.

What it is: CVE-2016-7152 is a medium-severity vulnerability in Apple Safari, published on 6 Sep 2016. 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-2016-7152 in the wild and no public exploit code.

Affected product: Apple Safari. 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-2016-7152/ (Markdown: https://insights.sbomify.com/CVE-2016-7152/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-7152
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-7152
- OSV: https://osv.dev/vulnerability/CVE-2016-7152

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-7152/
Summaries are generated and may contain mistakes; the official description above is the record.