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perl5143delta - what is new for perl v5.14.3

DESCRIPTION

This document describes differences between the 5.14.2 release and the 5.14.3 release.

If you are upgrading from an earlier release such as 5.12.0, first read perl5140delta,
which describes differences between 5.12.0 and 5.14.0.

Core Enhancements

No changes since 5.14.0.

Security

"Digest" unsafe use of eval (CVE-2011-3597)
The "Digest->new()" function did not properly sanitize input before using it in an eval()
call, which could lead to the injection of arbitrary Perl code.

In order to exploit this flaw, the attacker would need to be able to set the algorithm
name used, or be able to execute arbitrary Perl code already.

This problem has been fixed.

Heap buffer overrun in 'x' string repeat operator (CVE-2012-5195)
Poorly written perl code that allows an attacker to specify the count to perl's 'x' string
repeat operator can already cause a memory exhaustion denial-of-service attack. A flaw in
versions of perl before 5.15.5 can escalate that into a heap buffer overrun; coupled with
versions of glibc before 2.16, it possibly allows the execution of arbitrary code.

This problem has been fixed.

Incompatible Changes

There are no changes intentionally incompatible with 5.14.0. If any exist, they are bugs
and reports are welcome.

Deprecations

There have been no deprecations since 5.14.0.

Modules and Pragmata

New Modules and Pragmata
None

Updated Modules and Pragmata
· PerlIO::scalar was updated to fix a bug in which opening a filehandle to a glob copy
caused assertion failures (under debugging) or hangs or other erratic behaviour
without debugging.

· ODBM_File and NDBM_File were updated to allow building on GNU/Hurd.

· IPC::Open3 has been updated to fix a regression introduced in perl 5.12, which broke
"IPC::Open3::open3($in, $out, $err, '-')". [perl #95748]

· Digest has been upgraded from version 1.16 to 1.16_01.

See "Security".

· Module::CoreList has been updated to version 2.49_04 to add data for this release.

Removed Modules and Pragmata
None

Documentation

New Documentation
None

Changes to Existing Documentation
perlcheat

· perlcheat was updated to 5.14.

Configuration and Compilation

· h2ph was updated to search correctly gcc include directories on platforms such as
Debian with multi-architecture support.

· In Configure, the test for procselfexe was refactored into a loop.

Platform Support

New Platforms
None

Discontinued Platforms
None

Platform-Specific Notes
FreeBSD
The FreeBSD hints file was corrected to be compatible with FreeBSD 10.0.

Solaris and NetBSD
Configure was updated for "procselfexe" support on Solaris and NetBSD.

HP-UX
README.hpux was updated to note the existence of a broken header in HP-UX 11.00.

Linux
libutil is no longer used when compiling on Linux platforms, which avoids warnings
being emitted.

The system gcc (rather than any other gcc which might be in the compiling user's path)
is now used when searching for libraries such as "-lm".

Mac OS X
The locale tests were updated to reflect the behaviour of locales in Mountain Lion.

GNU/Hurd
Various build and test fixes were included for GNU/Hurd.

LFS support was enabled in GNU/Hurd.

NetBSD
The NetBSD hints file was corrected to be compatible with NetBSD 6.*

Bug Fixes

· A regression has been fixed that was introduced in 5.14, in "/i" regular expression
matching, in which a match improperly fails if the pattern is in UTF-8, the target
string is not, and a Latin-1 character precedes a character in the string that should
match the pattern. [perl #101710]

· In case-insensitive regular expression pattern matching, no longer on UTF-8 encoded
strings does the scan for the start of match only look at the first possible position.
This caused matches such as ""f\x{FB00}" =~ /ff/i" to fail.

· The sitecustomize support was made relocatableinc aware, so that -Dusesitecustomize
and -Duserelocatableinc may be used together.

· The smartmatch operator ("~~") was changed so that the right-hand side takes
precedence during "Any ~~ Object" operations.

· A bug has been fixed in the tainting support, in which an "index()" operation on a
tainted constant would cause all other constants to become tainted. [perl #64804]

· A regression has been fixed that was introduced in perl 5.12, whereby tainting errors
were not correctly propagated through "die()". [perl #111654]

· A regression has been fixed that was introduced in perl 5.14, in which
"/[[:lower:]]/i" and "/[[:upper:]]/i" no longer matched the opposite case. [perl
#101970]

Acknowledgements

Perl 5.14.3 represents approximately 12 months of development since Perl 5.14.2 and
contains approximately 2,300 lines of changes across 64 files from 22 authors.

Perl continues to flourish into its third decade thanks to a vibrant community of users
and developers. The following people are known to have contributed the improvements that
became Perl 5.14.3:

Abigail, Andy Dougherty, Carl Hayter, Chris 'BinGOs' Williams, Dave Rolsky, David
Mitchell, Dominic Hargreaves, Father Chrysostomos, Florian Ragwitz, H.Merijn Brand, Jilles
Tjoelker, Karl Williamson, Leon Timmermans, Michael G Schwern, Nicholas Clark, Niko Tyni,
Pino Toscano, Ricardo Signes, Salvador Fandin~o, Samuel Thibault, Steve Hay, Tony Cook.

The list above is almost certainly incomplete as it is automatically generated from
version control history. In particular, it does not include the names of the (very much
appreciated) contributors who reported issues to the Perl bug tracker.

Many of the changes included in this version originated in the CPAN modules included in
Perl's core. We're grateful to the entire CPAN community for helping Perl to flourish.

For a more complete list of all of Perl's historical contributors, please see the AUTHORS
file in the Perl source distribution.

Reporting Bugs

If you find what you think is a bug, you might check the articles recently posted to the
comp.lang.perl.misc newsgroup and the perl bug database at http://rt.perl.org/perlbug/ .
There may also be information at http://www.perl.org/ , the Perl Home Page.

If you believe you have an unreported bug, please run the perlbug program included with
your release. Be sure to trim your bug down to a tiny but sufficient test case. Your bug
report, along with the output of "perl -V", will be sent off to perlbug@perl.org to be
analysed by the Perl porting team.

If the bug you are reporting has security implications, which make it inappropriate to
send to a publicly archived mailing list, then please send it to
perl5-security-report@perl.org. This points to a closed subscription unarchived mailing
list, which includes all the core committers, who be able to help assess the impact of
issues, figure out a resolution, and help co-ordinate the release of patches to mitigate
or fix the problem across all platforms on which Perl is supported. Please only use this
address for security issues in the Perl core, not for modules independently distributed on
CPAN.

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