# CVE-2013-3587: Information disclosure in HTTPS protocol

> Man-in-the-middle attackers can recover plaintext secrets from compressed HTTPS traffic by observing response length differences, requiring mitigation via disabling compression or adding random padding.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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:** 21 Feb 2020
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-hh3m-fgxm-fq25

## What is CVE-2013-3587?

CVE-2013-3587 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 21 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The HTTPS protocol, as used in unspecified web applications, can encrypt compressed data without properly obfuscating the length of the unencrypted data, which makes it easier for man-in-the-middle attackers to obtain plaintext secret values by observing length differences during a series of guesses in which a string in an HTTP request URL potentially matches an unknown string in an HTTP response body, aka a "BREACH" attack, a different issue than CVE-2012-4929.

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

## Which versions are affected by CVE-2013-3587?

It affects 14 products.


Products: F5 Arx, F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Edge Gateway, F5 Big-Ip Link Controller, F5 Big-Ip Local Traffic Manager, F5 Big-Ip Policy Enforcement Manager, F5 Big-Ip Protocol Security Module, F5 Big-Ip Wan Optimization Manager, F5 Big-Ip Webaccelerator, F5 Firepass.

## How do I fix CVE-2013-3587?

No fix has been published for CVE-2013-3587 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-3587 being exploited?

There is no known exploitation of CVE-2013-3587 in the wild and no public exploit code.

## Other vulnerabilities in F5 Big-Ip Access Policy Manager

- [CVE-2014-2927](https://insights.sbomify.com/CVE-2014-2927/): Auth bypass in n/a (critical 9.3)
- [CVE-2011-3188](https://insights.sbomify.com/CVE-2011-3188/): Other in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-3587 and fix it if it is affected.

What it is: CVE-2013-3587 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 21 Feb 2020. 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-2013-3587 in the wild and no public exploit code.

Affected product: F5 Big-Ip Access Policy Manager. 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-2013-3587/ (Markdown: https://insights.sbomify.com/CVE-2013-3587/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-3587
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-3587
- OSV: https://osv.dev/vulnerability/CVE-2013-3587

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-3587/
Summaries are generated and may contain mistakes; the official description above is the record.