Uncaught exception in Fast DDS - CVE-2023-39945

Vulnerability identifier: #VU79820

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-39945

CWE-ID: CWE-248

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an uncaught exception when handling data submessage sent to PDP port in fastcdr. A remote attacker can send specially crafted data to the system and perform a denial of service (DoS) attack.

Fast DDS
Debian Linux
Ubuntu
fastdds-tools (Ubuntu package)
libfastrtps2.5 (Ubuntu package)
fastdds (Debian package)
libfastrtps2.9 (Ubuntu package)

Install updates from vendor's website.

Fast DDS - addressed in versions 2.6.5, 2.9.2, 2.10.2, 2.11.0
fastdds-tools (Ubuntu package) - addressed in versions Ubuntu Pro, 2.9.1+ds-1ubuntu0.1
libfastrtps2.5 (Ubuntu package) - update to Ubuntu Pro
fastdds (Debian package) - addressed in versions 2.1.0+ds-9+deb11u1, 2.9.1+ds-1+deb12u1
libfastrtps2.9 (Ubuntu package) - update to 2.9.1+ds-1ubuntu0.1

• https://github.com/eProsima/Fast-CDR/blob/v1.0.26/src/cpp/Cdr.cpp#L72-L79
• https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-2rq6-8j7x-frr9
• https://bombshell.gtisc.gatech.edu/ddsfuzz/pcap/fastdds-exception-20230509-02.pcap
• https://www.debian.org/security/2023/dsa-5481

• Uncaught exception in eProsima Fast DDS
• Debian update for fastdds
• Ubuntu update for fastdds