REDHAT-BUG-749324: Buffer Overflow

First published: Wed Oct 26 2011(Updated: )

A bug in slapd's UTF8StringNormalize() function can cause a one-byte buffer overflow when it is passed a zero-length string. The code then writes a '\0' past the one-byte long buffer allocated on the heap, which could possibly allow a remote authenticated user to crash slapd. As per the upstream report [1], this bug has been present since 2003-04-07 [2] so should affect all versions of openldap we currently ship. A patch to correct the flaw has been committed [3] (depends on the previous patch [4]). [1] <a href="http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059">http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059</a> [2] <a href="http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=67d6b23d">http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=67d6b23d</a> [3] <a href="http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9">http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9</a> [4] <a href="http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=d0dd8616f1c68a868afeb8c2c5c09969e366e2c0">http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=d0dd8616f1c68a868afeb8c2c5c09969e366e2c0</a>

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