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TITLE:
nCipher CHIL Random Cache Inheritance Security Issue

SECUNIA ADVISORY ID:
SA16323

VERIFY ADVISORY:
http://secunia.com/advisories/16323/

CRITICAL:
Moderately critical

IMPACT:
Unknown

WHERE:
>From remote

SOFTWARE:
nCipher Cryptographic Hardware Interface Library (CHIL) 1.x
http://secunia.com/product/5479/

DESCRIPTION:
A security issue has been reported in nCipher CHIL (Cryptographic
Hardware Interface Library), which may result in a program generating
the same random bytes in all child processes for a certain period of
time.

The security issue is caused due to the "HWCryptoHook_RandomBytes()"
function not clearing its cache of random bytes when a process
calling the function forks. This causes each child process to use the
same sequence of random bytes until they exhaust this cache.

Successful exploitation requires that the application forks child
processes and is dependent on how CHIL is used in the application
(e.g. child processes of a vulnerable application may generate the
same session keys).

The security issue affects versions prior to 1.9.7.

SOLUTION:
Update to version 1.9.7 or later and re-link affected applications to
the fixed library.

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
nCipher:
http://www.ncipher.com/support/advisories/keysigs/advisory11.txt.asc

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About:
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