# CVE-2016-5429: Information disclosure in n/a

> Remote attackers can obtain sensitive information via timing attacks due to non-constant-time HMAC comparisons in the jose-php library.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/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:** 3 Sep 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-rcq3-9j7g-jm67

## What is CVE-2016-5429?

CVE-2016-5429 is a low-severity vulnerability in n/a, published on 3 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

jose-php before 2.2.1 does not use constant-time operations for HMAC comparison, which makes it easier for remote attackers to obtain sensitive information via a timing attack, related to JWE.php and JWS.php.

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

## Which versions are affected by CVE-2016-5429?

It affects 1 product.


Products: Jose-Php Project Jose-Php.

## How do I fix CVE-2016-5429?

No fix has been published for CVE-2016-5429 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-5429 being exploited?

There is no known exploitation of CVE-2016-5429 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2016-5430](https://insights.sbomify.com/CVE-2016-5430/): The RSA 1.5 algorithm implementation in the JOSE_JWE class in JWE.php in jose-php before 2.2.1 lacks the Random Filling protection mechanism (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-5429 and fix it if it is affected.

What it is: CVE-2016-5429 is a low-severity vulnerability in n/a, published on 3 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-2016-5429 in the wild and no public exploit code.

Affected product: n/a. 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-2016-5429/ (Markdown: https://insights.sbomify.com/CVE-2016-5429/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-5429
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-5429
- OSV: https://osv.dev/vulnerability/CVE-2016-5429

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-5429/
Summaries are generated and may contain mistakes; the official description above is the record.