The DBD::mysql module through 4.043 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.

Affected: Ubuntu:Pro:16.04:LTS: libdbd-mysql-perl

It was discovered that the DBD::mysql module, when configured with server-side prepared statement support, was susceptible to operations that would result in improper memory access. An attacker could possibly use this issue to cause DBD::mysql to crash, resulting in a denial of service. (CVE-2016-1249, CVE-2016-1251)

It was discovered that the DBD::mysql module was susceptible to an operation that would result in improper memory access, introduced through incorrect documentation and code examples. An attacker could possibly use this issue to cause DBD::mysql to crash or potentially cause other, unspecified, impact. (CVE-2017-10788)

It was discovered that the DBD::mysql module processed SSL/TLS settings in a way that did not fully correlate with the respective documentation for each setting. An attacker could possibly use this to perform a cleartext-downgrade attack. (CVE-2017-10789)