Good afternoon. Multiple flaws in NSS were reported to Mozilla on or around 28
April 2017 and as of this notification have not been resolved and as such, I am
disclosing them to the public so that anyone making use of NSS is aware that
these exist. Please note that as I send this, the bugs remain hidden on the
Mozilla Bugzilla tracker.
What is NSS? Network Security Services (NSS) comprises a set of libraries
designed to support cross-platform development of security-enabled client and
server applications with optional support for hardware TLS/SSL acceleration on
the server side and hardware smart cards on the client side. NSS provides a
complete open-source implementation of cryptographic libraries supporting
Transport Layer Security (TLS) / Secure Sockets Layer (SSL) and S/MIME.
All of the following flaws were triggered with changeset 13315:769f9ae07b10 in
Mozilla's Mercurial repository (https://hg.mozilla.org/projects/nss) and can
all be triggered using the NSS tool `certutil` and malformed `cert8.db` files
which I have uploaded to https://github.com/geeknik/cve-fuzzing-poc.
CVE-2017-11695: heap-buffer-overflow (write of size 8) in alloc_segs
CVE-2017-11696: heap-buffer-overflow (write of size 65544) in __hash_open
CVE-2017-11697: Floating Point Exception in __hash_open (hash.c:229)
CVE-2017-11698: heap-buffer-overflow (write of size 2) in __get_page
These flaws were discovered by Brian Carpenter of Geeknik Labs
(http://www.geeknik.net) using the American Fuzzy Lop tool.
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