CVE-2023-39946

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.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1043548&gt;