It was discovered that the SQL plugin in cyrus-sasl2, a library
implementing the Simple Authentication and Security Layer, is prone to a
SQL injection attack. An authenticated remote attacker can take advantage
of this flaw to execute arbitrary SQL commands and for privilege
escalation.
For Debian 9 stretch, this problem has been fixed in version
2.1.27~101-g0780600+dfsg-3+deb9u2.
We recommend that you upgrade your cyrus-sasl2 packages.
For the detailed security status of cyrus-sasl2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/cyrus-sasl2
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
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