It was discovered that ZeroMQ, a lightweight messaging kernel library does not properly handle connecting peers before a handshake is completed. A remote, unauthenticated client connecting to an application using the libzmq library, running with a socket listening with CURVE encryption/authentication enabled can take advantage of this flaw to cause a denial of service affecting authenticated and encrypted clients. For the stable distribution (buster), this problem has been fixed in version 4.3.1-4+deb10u2. We recommend that you upgrade your zeromq3 packages. For the detailed security status of zeromq3 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/zeromq3
It was discovered that ZeroMQ, a lightweight messaging kernel library does not properly handle connecting peers before a handshake is completed. A remote, unauthenticated client connecting to an application using the libzmq library, running with a socket listening with CURVE encryption/authentication enabled can take advantage of this flaw to cause a denial of service affecting authenticated and encrypted clients.
For the stable distribution (buster), this problem has been fixed in version 4.3.1-4+deb10u2.
We recommend that you upgrade your zeromq3 packages.
For the detailed security status of zeromq3 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/zeromq3
Vulmon