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DBI-1.631-TRIAL2
⭐ Starred 84 / DBD::Gofer::Policy::Base
Security Advisories (16)
CVE-2020-14393 (2020-09-16)

A buffer overflow was found in perl-DBI < 1.643 in DBI.xs. A local attacker who is able to supply a string longer than 300 characters could cause an out-of-bounds write, affecting the availability of the service or integrity of data.

CVE-2020-14392 (2020-06-17)

An untrusted pointer dereference flaw was found in Perl-DBI < 1.643. A local attacker who is able to manipulate calls to dbd_db_login6_sv() could cause memory corruption, affecting the service's availability.

CVE-2019-20919 (2020-09-17)

An issue was discovered in the DBI module before 1.643 for Perl. The hv_fetch() documentation requires checking for NULL and the code does that. But, shortly thereafter, it calls SvOK(profile), causing a NULL pointer dereference.

CPANSA-DBI-2014-01 (2014-10-15)

DBD::File drivers open files from folders other than specifically passed using the f_dir attribute.

CVE-2014-10402 (2020-09-16)

An issue was discovered in the DBI module through 1.643 for Perl. DBD::File drivers can open files from folders other than those specifically passed via the f_dir attribute in the data source name (DSN). NOTE: this issue exists because of an incomplete fix for CVE-2014-10401.

CVE-2014-10401 (2020-09-11)

An issue was discovered in the DBI module before 1.632 for Perl. DBD::File drivers can open files from folders other than those specifically passed via the f_dir attribute.

CVE-2013-7490 (2020-09-11)

An issue was discovered in the DBI module before 1.632 for Perl. Using many arguments to methods for Callbacks may lead to memory corruption.

CVE-2026-10879 (2026-06-05)

DBI versions before 1.648 for Perl have a heap overflow when preparsing SQL statements with more than 9 binders. The preparse method expands SQL placeholder characters to numbered binders of the form :pN, but only allocates three characters per binder in the buffer. Placeholders 10-99 require four characters, 100-999 require five characters, et cetera.

CVE-2026-9698 (2026-06-09)

DBI versions before 1.648 for Perl saved errors in a limited-sized buffer. Error messages that were returned when RaiseError, PrintError or HandleError were set were written to a 200-byte buffer without a length limit. Attackers that can influence the error text in an application can trigger a buffer overflow.

CVE-2026-14739 (2026-07-07)

DBI versions before 1.650 for Perl have a heap overflow when preparsing SQL statements with an extreme number of placeholders. The fix for CVE-2026-10879 did not allocate enough memory to handle approximately 1.2-million placeholders. DBI version 1.650 sets a hard limit of 99,999 placeholders.

CVE-2026-14740 (2026-07-07)

DBI versions before 1.650 for Perl read one byte out-of-bounds in preparse when deleting an initial SQL comment. The preparse method normalises SQL and removes comments. When the SQL starts with a comment line, the deletion of that line during normalisation led to an out-of-bounds read by one byte. The result is a fault on memory-hardened builds and nondeterministic newline retention on normal builds.

CVE-2026-14380 (2026-07-07)

DBI versions before 1.650 for Perl are vulnerable to code injection via caller-influenced Profile. When a string is assigned to a DBI handle's Profile attribute, DBI splits it into path, package and arguments, and interpolates the package part in a string eval with no validation of the package name. Any caller-influenced value that reaches the Profile attribute is therefore arbitrary Perl code execution, including calls to run system commands. The Profile attribute can be set from three different sources that can carry untrusted data: the DBI_PROFILE environment variable, a direct attribute assignment, and a DSN driver-attribute clause dbi:Driver(Profile=>SPEC):db. An attacker controlling any of those inputs runs arbitrary Perl in the host process. The strongest remote position is a network-exposed DBI::Gofer / DBI::ProxyServer whose per-request DSN reaches the Profile attribute, letting a client execute code on the broker host.

CVE-2026-15043 (2026-07-14)

DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text. DBI::SQL::Nano, DBI's built-in mini-SQL engine, evaluated WHERE predicates incorrectly in some cases. In the non-numeric string branch of the is_matched method, <= was evaluated using Perl's ge operator, and >= was evaluated using Perl's le operator. SQL::Nano is the fallback query engine for DBI's file-backed drivers (DBD::File, DBD::DBM, CSV-style drivers) whenever SQL::Statement is not installed, and is forced whenever DBI_SQL_NANO=1. Queries over such tables use these predicates directly. The impact depends on the context. Where an application relies on a WHERE clause to filter file-backed data for policy or authorization, an inverted <=/>= comparison silently returns the wrong rows.

CVE-2026-15392 (2026-07-14)

DBD::File versions before 1.651 for Perl do not ensure the table file is not a symlink to an untrusted location. The complete_table_name method builds the absolute table file path without checking whether the file is a symbolic link. A link inside the data directory can point to a table file at any path outside of the configured f_dir and f_dir_search directories. Callers of file-based drivers can read or write files outside of the data directory.

CVE-2026-60081 (2026-07-14)

DBI::ProfileData versions before 1.651 for Perl do not limit the path index. The path index column of profile dump files is used to allocate an array of data for the parser. An unbounded value allows an attacker to specify a large index and consume available memory.

CVE-2026-60082 (2026-07-14)

DBI versions before 1.651 for Perl do not enforce statement handle consistency with the row. When the statement handle had no fields but the source row was non-empty, the internal row-buffer helper would read from a negative array index. This could be triggered by a caller supplying inconsistent metadata and rows to the prepare method.

NAME

DBD::Gofer::Policy::Base - Base class for DBD::Gofer policies

SYNOPSIS

$dbh = DBI->connect("dbi:Gofer:transport=...;policy=...", ...)

DESCRIPTION

DBD::Gofer can be configured via a 'policy' mechanism that allows you to fine-tune the number of round-trips to the Gofer server. The policies are grouped into classes (which may be subclassed) and referenced by the name of the class.

The DBD::Gofer::Policy::Base class is the base class for all the policy classes and describes all the individual policy items.

The Base policy is not used directly. You should use a policy class derived from it.

POLICY CLASSES

Three policy classes are supplied with DBD::Gofer:

DBD::Gofer::Policy::pedantic is most 'transparent' but slowest because it makes more round-trips to the Gofer server.

DBD::Gofer::Policy::classic is a reasonable compromise - it's the default policy.

DBD::Gofer::Policy::rush is fastest, but may require code changes in your applications.

Generally the default classic policy is fine. When first testing an existing application with Gofer it is a good idea to start with the pedantic policy first and then switch to classic or a custom policy, for final testing.

POLICY ITEMS

These are temporary docs: See the source code for list of policies and their defaults.

In a future version the policies and their defaults will be defined in the pod and parsed out at load-time.

See the source code to this module for more details.

POLICY CUSTOMIZATION

XXX This area of DBD::Gofer is subject to change.

There are three ways to customize policies:

Policy classes are designed to influence the overall behaviour of DBD::Gofer with existing, unaltered programs, so they work in a reasonably optimal way without requiring code changes. You can implement new policy classes as subclasses of existing policies.

In many cases individual policy items can be overridden on a case-by-case basis within your application code. You do this by passing a corresponding <go_<policy_name>> attribute into DBI methods by your application code. This let's you fine-tune the behaviour for special cases.

The policy items are implemented as methods. In many cases the methods are passed parameters relating to the DBD::Gofer code being executed. This means the policy can implement dynamic behaviour that varies depending on the particular circumstances, such as the particular statement being executed.

AUTHOR

Tim Bunce, http://www.tim.bunce.name

LICENCE AND COPYRIGHT

Copyright (c) 2007, Tim Bunce, Ireland. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.