FreshPorts - VuXML

Perl developers report:

In order to prevent an algorithmic complexity attack against its hashing mechanism, perl will sometimes recalculate keys and redistribute the contents of a hash. This mechanism has made perl robust against attacks that have been demonstrated against other systems.

Research by Yves Orton has recently uncovered a flaw in the rehashing code which can result in pathological behavior. This flaw could be exploited to carry out a denial of service attack against code that uses arbitrary user input as hash keys.

Because using user-provided strings as hash keys is a very common operation, we urge users of perl to update their perl executable as soon as possible.

lt 5.12.4_5

ge 5.14.0 lt 5.14.2_3

ge 5.16.0 lt 5.16.2_1

lt 5.12.4_5

ge 5.14.0 lt 5.14.2_3

ge 5.16.0 lt 5.16.2_1

Red Hat reports:

A flaw was found in Perl's regular expression engine. Specially crafted input to a regular expression can cause Perl to improperly allocate memory, possibly resulting in arbitrary code running with the permissions of the user running Perl.

gt 5.8.* lt 5.8.8_1

Secunia reports:

Paul Szabo has reported a vulnerability in Perl File::Path::rmtree, which potentially can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a race condition in the way File::Path::rmtree handles directory permissions when cleaning up directories. This can be exploited by replacing an existing sub directory in the directory tree with a symbolic link to an arbitrary file.

Successful exploitation may allow changing permissions of arbitrary files, if root uses an application using the vulnerable code to delete files in a directory having a world-writable sub directory.

ge 5.8.0 lt 5.8.9

Secunia reports:

Paul Szabo has reported a vulnerability in Perl File::Path::rmtree, which potentially can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a race condition in the way File::Path::rmtree handles directory permissions when cleaning up directories. This can be exploited by replacing an existing sub directory in the directory tree with a symbolic link to an arbitrary file.

Successful exploitation may allow changing permissions of arbitrary files, if root uses an application using the vulnerable code to delete files in a directory having a world-writable sub directory.

ge 5.8.0 lt 5.8.9

Red Hat reports:

A flaw was found in Perl's regular expression engine. Specially crafted input to a regular expression can cause Perl to improperly allocate memory, possibly resulting in arbitrary code running with the permissions of the user running Perl.

gt 5.8.* lt 5.8.8_1