### [CVE-2019-25017](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25017)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

An issue was discovered in rcp in MIT krb5-appl through 1.0.3. Due to the rcp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the rcp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious rcp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the rcp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file). This issue is similar to CVE-2019-6111 and CVE-2019-7283. NOTE: MIT krb5-appl is not supported upstream but is shipped by a few Linux distributions. The affected code was removed from the supported MIT Kerberos 5 (aka krb5) product many years ago, at version 1.8.

### POC

#### Reference
- https://bugzilla.suse.com/show_bug.cgi?id=1131109
- https://bugzilla.suse.com/show_bug.cgi?id=1131109

#### Github
- https://github.com/vshaliii/Basic-Pentesting-2-Vulnhub-Walkthrough
- https://github.com/vshaliii/DC-4-Vulnhub-Walkthrough