cve/2023/CVE-2023-39946.md

### [CVE-2023-39946](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39946)
![](https://img.shields.io/static/v1?label=Product&message=Fast-DDS&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%202.6.6%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-122%3A%20Heap-based%20Buffer%20Overflow&color=brighgreen)

### Description

eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.11.1, 2.10.2, 2.9.2, and 2.6.6, heap can be overflowed by providing a PID_PROPERTY_LIST parameter that contains a CDR string with length larger than the size of actual content. In `eprosima::fastdds::dds::ParameterPropertyList_t::push_back_helper`, `memcpy` is called to first copy the octet'ized length and then to copy the data into `properties_.data`. At the second memcpy, both `data` and `size` can be controlled by anyone that sends the CDR string to the discovery multicast port. This can remotely crash any Fast-DDS process. Versions 2.11.1, 2.10.2, 2.9.2, and 2.6.6 contain a patch for this issue.

### POC

#### Reference
- https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-j297-rg6j-m7hx

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds