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.

• https://github.com/perl5-dbi/DBD-mysql/issues/120
• http://www.securityfocus.com/bid/99374
• http://seclists.org/oss-sec/2017/q2/443

The DBD::mysql module through 4.043 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.

• https://github.com/perl5-dbi/DBD-mysql/pull/114

Out-of-bounds read.

• https://github.com/perl5-dbi/DBD-mysql/commit/793b72b1a0baa5070adacaac0e12fd995a6fbabe

Buffer overflow in the DBD::mysql module before 4.037 for Perl allows context-dependent attackers to cause a denial of service (crash) via vectors related to an error message.

• https://github.com/perl5-dbi/DBD-mysql/commit/7c164a0c86cec6ee95df1d141e67b0e85dfdefd2
• http://blogs.perl.org/users/mike_b/2016/10/security-release---buffer-overflow-in-dbdmysql-perl-library.html

Use-after-free vulnerability in the my_login function in DBD::mysql before 4.033_01 allows attackers to have unspecified impact by leveraging a call to mysql_errno after a failure of my_login.

• https://github.com/perl5-dbi/DBD-mysql/commit/cf0aa7751f6ef8445e9310a64b14dc81460ca156

There is a vulnerability of type use-after-free affecting DBD::mysql (aka DBD-mysql or the Database Interface (DBI) MySQL driver for Perl) 3.x and 4.x before 4.041 when used with mysql_server_prepare=1.

• https://github.com/perl5-dbi/DBD-mysql/commit/3619c170461a3107a258d1fd2d00ed4832adb1b1

Use-after-free vulnerability in DBD::mysql before 4.029 allows attackers to cause a denial of service (program crash) or possibly execute arbitrary code via vectors related to a lost server connection.

• https://github.com/perl5-dbi/DBD-mysql/commit/a56ae87a4c1c1fead7d09c3653905841ccccf1cc
• https://rt.cpan.org/Public/Bug/Display.html?id=97625