Debian LTS: DLA-2444-1: tcpdump security update
Summary
The ppp de-capsulator in tcpdump 4.9.3 can be convinced to allocate
a large amount of memory.
The buffer should be big enough to hold the captured data, but it
doesn’t need to be big enough to hold the entire on-the-network
packet, if we haven’t captured all of it.
For Debian 9 stretch, this problem has been fixed in version
4.9.3-1~deb9u2.
We recommend that you upgrade your tcpdump packages.
For the detailed security status of tcpdump please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/tcpdump
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS