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Arrow  Topic :

DoS and code execution issue in LedgerSMB < 1.1.5 and SQL-Ledger < 2.6.25


Arrow  SecurityAlert : 2435
Arrow  CVE : CVE-2007-1437
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : No
Arrow  Credit : Chris Travers
Arrow  Published : 21.03.2007

Arrow  Affected Software : LedgerSMB < 1.1.5 and SQL-Ledger < 2.6.25



Arrow  Advisory Content :  

Hi;

A person on the LedgerSMB core team has found a serious arbitrary code
execution issue in LedgerSMB prior to 1.1.5 and SQL-Ledger. A version
of SQL-Ledger which fixes this vulnerability was released today (version
2.6.25).

The vulnerability allows a user to specify a custom function to run when
the software encounters an error. The software further assumes that the
error function specified never returns. For this reason, it is possible
to cause the software to take alternate paths of execution, and to force
these paths. This is particularly dangerous for users with valid logins.

For those which do not have valid login credentials, the problem more
limited but still quite dangerous. Using this method it is possible to
overwrite files in the users directory, thus affecting a DoS attack and
possible authentication bypass.

The DoS attacks can be done by any user not currently logged in, and can
force the writing of a nologin file (which will lock users out of the
system) or overwrite the users/members file (which contains users'
credentials info and settings) with invalid data. This attack can be
done with wget, for example.

All SQL-Ledger users are advised to upgrade to the latest version, and
all LedgerSMB users using versions prior to 1.1.5 should upgrade as well.

Best Wishes,
Chris Travers
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fn:Chris Travers
n:Travers;Chris
email;internet:chris (at) metatrontech (dot) com [email concealed]
tel;work:509-888-0220
tel;cell:509-630-7794
x-mozilla-html:FALSE
version:2.1
end:vcard





Arrow  Feedback :

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