# XML Security Cheat Sheet — DNS-Cache Poisoning

> Remote schema poisoning may also be possible even when using encrypted protocols like Hypertext Transfer Protocol Secure (HTTPS).

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-owasp-570327f1b344832dbff4>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:31:42.536281+00:00`
- Tags: `reference-seed`, `owasp`, `cheatsheets`, `xml`, `security`, `cheat`, `sheet`, `dns-cache`, `poisoning`

## Provenance

- Source: <https://github.com/OWASP/CheatSheetSeries/blob/07111ee754e832e335377ac64fd0f8f848d9029c/cheatsheets/XML_Security_Cheat_Sheet.md>
- Source name: OWASP Cheat Sheet Series
- Source revision: `07111ee754e832e335377ac64fd0f8f848d9029c`
- Source license: `CC-BY-SA-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

Remote schema poisoning may also be possible even when using encrypted protocols like Hypertext Transfer Protocol Secure (HTTPS). When software performs reverse Domain Name System (DNS) resolution on an IP address to obtain the hostname, it may not properly ensure that the IP address is truly associated with the hostname. In this case, the software enables an attacker to redirect content to their own Internet Protocol (IP) addresses.

The previous example referenced the host example.com using an unencrypted protocol.

When switching to HTTPS, the location of the remote schema will look like In a normal scenario, the IP of example.com resolves to 1.1.1.1

Bounded code example (external data; do not execute automatically):
```bash
$ host example.com
example.com has address 1.1.1.1
```

If an attacker compromises the DNS being used, the previous hostname could now point to a new, different IP controlled by the attacker 2.2.2.2

Bounded code example (external data; do not execute automatically):
```bash
$ host example.com
example.com has address 2.2.2.2
```

When accessing the remote file, the victim may be actually retrieving the contents of a location controlled by an attacker.

Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.