# CVE-2021-29662: Security feature bypass in n/a

> Attackers can bypass IP-based access controls by using IP addresses with leading zeros, affecting applications using the Perl Data::Validate::IP module.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 31 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2021-29662, GHSA-r243-xrwf-w499, UBUNTU-CVE-2021-29662

## What is CVE-2021-29662?

CVE-2021-29662 is a high-severity vulnerability in Netapp Snapcenter, published on 31 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Data::Validate::IP module through 0.29 for Perl does not properly consider extraneous zero characters at the beginning of an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses.

Weakness: CWE-704 (Incorrect Type Conversion or Cast)

## Which versions are affected by CVE-2021-29662?

It affects 2 products.


Products: Data\ \, Netapp Snapcenter.

## How do I fix CVE-2021-29662?

Upgrade to a fixed version.

## Is CVE-2021-29662 being exploited?

There is no known exploitation of CVE-2021-29662 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Snapcenter

- [CVE-2013-4184](https://insights.sbomify.com/CVE-2013-4184/): Path traversal in libdata-uuid-perl (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29662 and fix it if it is affected.

What it is: CVE-2021-29662 is a high-severity vulnerability in Netapp Snapcenter, published on 31 Mar 2021. 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-2021-29662 in the wild and no public exploit code.

Affected product: Netapp Snapcenter. 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-2021-29662/ (Markdown: https://insights.sbomify.com/CVE-2021-29662/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29662
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29662
- OSV: https://osv.dev/vulnerability/CVE-2021-29662

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29662/
Summaries are generated and may contain mistakes; the official description above is the record.