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TITLE:
Perl Net::SSLeay Module Entropy Source Manipulation

SECUNIA ADVISORY ID:
SA15207

VERIFY ADVISORY:
http://secunia.com/advisories/15207/

CRITICAL:
Less critical

IMPACT:
Manipulation of data

WHERE:
Local system

SOFTWARE:
Net::SSLeay 1.x (module for Perl)
http://secunia.com/product/5038/

DESCRIPTION:
Javier Fernandez-Sanguino Pena has reported a vulnerability in the
Net::SSLeay module for Perl, which can be exploited by malicious,
local users to weaken certain cryptographic operations.

The vulnerability is caused due an error where the entropy source is
improperly taken from a temporary file if the "EGD_PATH" environment
variable is not defined. This can be exploited to weaken certain
cryptographic operations via a "/tmp/entropy" file with known
contents.

SOLUTION:
Set the "EGD_PATH" environment variable.

PROVIDED AND/OR DISCOVERED BY:
Javier Fernandez-Sanguino Pena

ORIGINAL ADVISORY:
http://www.ubuntulinux.org/support/documentation/usn/usn-113-1

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