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-----BEGIN PGP SIGNED MESSAGE----- |
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Hash: SHA1 |
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- - -------------------------------------------------------------------- |
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GENTOO LINUX SECURITY ANNOUNCEMENT 200301-4 |
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|
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PACKAGE : libmcrypt |
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SUMMARY : buffer overflows and memory exhaustion |
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DATE : 2003-01-05 12:01 UTC |
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EXPLOIT : remote |
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|
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|
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Post by Ilia Alshanetsky <ilia@×××××××.org>: |
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|
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"limbcrypt versions prior to 2.5.5 contain a number of buffer |
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overflow vulnerabilities that stem from imporper or lacking input |
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validation. By passing a longer then expected input to a number of |
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functions (multiple functions are affected) the user can successful |
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make libmcrypt crash. |
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|
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Another vulnerability is due to the way libmcrypt loads algorithms via |
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libtool. When the algorithms are loaded dynamically the each time the |
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algorithm is loaded a small (few kilobytes) of memory are leaked. In a |
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persistant enviroment (web server) this could lead to a memory |
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exhaustion attack that will exhaust all avaliable memory by launching |
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repeated requests at an application utilizing the mcrypt library. |
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|
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The solution to both of these problem is to upgrade to the latest |
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release of libmcrypt, 2.5.5." |
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|
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SOLUTION |
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|
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It is recommended that all Gentoo Linux users who are running |
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dev-libs/libmcrypt-2.5.1-r4 or earlier update their systems as |
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follows: |
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|
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emerge rsync |
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emerge libmcrypt |
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emerge clean |
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|
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- - -------------------------------------------------------------------- |
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aliz@g.o - GnuPG key is available at www.gentoo.org/~aliz |
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