Debian 10: DSA-4250-1 Severe LibVNCServer Buffer Overflow

Alexander Peslyak discovered that insufficient input sanitising of RFB
packets in LibVNCServer could result in the disclosure of memory
contents.

For the oldstable distribution (jessie), this problem has been fixed
in version 0.9.9+dfsg2-6.1+deb8u3.

For the stable distribution (stretch), this problem has been fixed in
version 0.9.11+dfsg-1+deb9u1.

We recommend that you upgrade your libvncserver packages.

For the detailed security status of libvncserver please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libvncserver

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/