TITLE:
PuTTY Two Integer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA14333

VERIFY ADVISORY:
http://secunia.com/advisories/14333/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
PuTTY 0.x
http://secunia.com/product/1137/

DESCRIPTION:
Two vulnerabilities have been reported in PuTTY, which can be
exploited by malicious people to compromise a user's system.

1) An integer overflow in the "fxp_readdir_recv()" function in
"sftp.c" can be exploited to execute arbitrary code via a malicious
SFTP (SSH File Transfer Protocol) server sending a specially crafted
respond to the "FXP_READDIR" command.

2) An integer overflow in the "sftp_pkt_getstring()" function in
"sftp.c" can be exploited to execute arbitrary code via a malicious
SFTP server sending a specially crafted string field.

NOTE: Successful exploitation is only possible after host key
verification.

The vulnerabilities have been reported in versions prior to 0.57.

SOLUTION:
Update to version 0.57.
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

PROVIDED AND/OR DISCOVERED BY:
Discovered by anonymous person and reported via iDEFENSE.

ORIGINAL ADVISORY:
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-readdir.html
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-string.html

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