Debian Security Advisory

DLA-1079-1 libdbd-mysql-perl -- LTS security update

Date Reported:
31 Aug 2017
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 866818, Bug 866821.
In Mitre's CVE dictionary: CVE-2017-10788, CVE-2017-10789.
More information:

The Perl library for communicating with MySQL database, used in the mysql commandline client is vulnerable to a man in the middle attack in SSL configurations and remote crash when connecting to hostile servers.

  • CVE-2017-10788

    The DBD::mysql module through 4.042 for Perl allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly have unspecified other impact by triggering (1) certain error responses from a MySQL server or (2) a loss of a network connection to a MySQL server. The use-after-free defect was introduced by relying on incorrect Oracle mysql_stmt_close documentation and code examples.

  • CVE-2017-10789

    The DBD::mysql module through 4.042 for Perl uses the mysql_ssl=1 setting to mean that SSL is optional (even though this setting's documentation has a your communication with the server will be encrypted statement), which allows man-in-the-middle attackers to spoof servers via a cleartext-downgrade attack, a related issue to CVE-2015-3152.

For Debian 7 Wheezy, these problems have been fixed in version 4.021-1+deb7u3.

We recommend that you upgrade your libdbd-mysql-perl packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: