Ingo Franzki 5fdeaab3d0 libkmipclient: Limit the nesting level of KMIP STRUCTURE recursion ...

KMIP STRUCTURE elements can be nested, which causes a recursion of
functions kmip_decode_ttlv(), kmip_decode_xml(), and kmip_decode_json().
A malformed KMIP response may thus cause stack exhaustion.

Limit the KMIP STRUCTURE nesting level to 32 levels. This is more than
enough for currently defined KMIP responses. The practically used
nesting level is 8 or 9, dependent on the type of KMIP response.

Assisted-by: IBM Bob:2.0.0
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Finn Callies <fcallies@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

2026-07-20 15:25:58 +02:00

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