high
8.2
CWE
787 122
Advisory Published
CVE Published
Updated

CVE-2023-39946: Heap overflow in push_back_helper due to a CDR message

First published: Fri Aug 11 2023(Updated: )

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.

Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
ubuntu/fastdds<2.10.1+
2.10.1+
ubuntu/fastdds<2.5.0+
2.5.0+
ubuntu/fastdds<2.9.1+
2.9.1+
eprosima Fast DDS>=2.6.0<2.6.6
eprosima Fast DDS>=2.9.0<2.9.2
eprosima Fast DDS>=2.10.0<2.10.2
eprosima Fast DDS=2.11.0
Debian Debian Linux=11.0
Debian Debian Linux=12.0
>=2.6.0<2.6.6
>=2.9.0<2.9.2
>=2.10.0<2.10.2
=2.11.0
=11.0
=12.0
debian/fastdds
2.1.0+ds-9+deb11u1
2.9.1+ds-1+deb12u2
2.11.2+ds-6

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-39946?

    CVE-2023-39946 is a vulnerability in eprosima Fast DDS that allows for a heap overflow by providing a PID_PROPERTY_LIST parameter with a CDR string of larger length.

  • How does CVE-2023-39946 affect eprosima Fast DDS?

    CVE-2023-39946 affects eprosima Fast DDS versions 2.6.0 to 2.6.6, 2.9.0 to 2.9.2, 2.10.0 to 2.10.2, and 2.11.0.

  • What is the severity of CVE-2023-39946?

    CVE-2023-39946 has a severity rating of 7.5, which is considered high.

  • How can I fix CVE-2023-39946?

    To fix CVE-2023-39946, upgrade to eprosima Fast DDS versions 2.6.7, 2.9.3, 2.10.3, or 2.11.1.

  • Where can I find more information about CVE-2023-39946?

    You can find more information about CVE-2023-39946 in the eprosima Fast DDS GitHub repository and the Debian Security Advisory.

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