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Date: Fri, 31 May 2013 13:10:23 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: Open Source Security <oss-security@...ts.openwall.com>
Subject: CVE-2013-2132 MongoDB: User-triggerable NULL pointer dereference
 due to utter plebbery

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https://jira.mongodb.org/browse/PYTHON-532

Short summary:

Step 1. Use Mongo as WEB SCALE DOCUMENT STORE OF CHOICE LOL
Step 2. Assume basic engineering principles applied throughout due to
HEAVY MARKETING SUGGESTING AWESOMENESS.
Step 3. Spend 6 months fighting plebbery across the spectrum, mostly
succeed.
Step 4. NIGHT BEFORE INVESTOR DEMO, TRY UPLOADING SOME DATA WITH
"{$ref: '#/mongodb/plebtastic'"
Step 5. LOL WTF?!?!? PYMONGO CRASH?? :OOO LOOOL WEBSCALE
Step 6. It's 4am now. STILL INVESTIGATING
b4cb9be0 pymongo/_cbsonmodule.c (Mike Dirolf 2009-11-10 14:54:39 -0500
1196) /* Decoding for DBRefs */
Oh Mike!!!


3. ADD process_dbrefs=False TO ALL THE DRIVERS

To reproduce:
? in mongo shell:
db.python532.insert({x : {"$ref" : "whatever"} });
? in python shell
import pymongo
pymongo.MongoClient().test.python532.find_one()

Fix:
https://github.com/mongodb/mongo-python-driver/commit/a060c15ef87e0f0e72974c7c0e57fe811bbd06a2

BTW can someone from 10gen contact me so we can start doing the CVEs
for MongoDB properly? Thanks.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993
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