CVE-2023-39948 Uncaught fastcdr exception (Unexpected CDR type received) crashing fastdds
An attacker can remotely crash Fast DDS processes by sending malformed data that triggers an uncaught exception, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-39948?
CVE-2023-39948 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 11 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.10.0 and 2.6.5, the `BadParamException` thrown by Fast CDR is not caught in Fast DDS. This can remotely crash any Fast DDS process. Versions 2.10.0 and 2.6.5 contain a patch for this issue.
Weakness: CWE-248
Which versions are affected by CVE-2023-39948?
It affects 2 products.
Products include Debian Debian Linux, Eprosima Fast Dds.
How do I fix CVE-2023-39948?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-39948 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39948 exists.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2023-39948, GHSA-x9pj-vrgf-f68f, UBUNTU-CVE-2023-39948.