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Fedora Update Notification
FEDORA-2018-06c24068c6
2018-07-31 17:09:33.504512
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Name : python-cryptography
Product : Fedora 27
Version : 2.3
Release : 1.fc27
URL : https://cryptography.io/en/latest/
Summary : PyCA’s cryptography library
Description :
cryptography is a package designed to expose cryptographic primitives and
recipes to Python developers.

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Update Information:

# New upstream release 2.3 Fixes possible tag truncation security bug in AEAD
API, see RHBZ#1602752 ## 2.3 – 2018-07-18 * SECURITY ISSUE:
finalize_with_tag() allowed tag truncation by default which can allow tag
forgery in some cases. The method now enforces the min_tag_length provided to
the GCM constructor. * Added support for Python 3.7. * Added extract_timestamp()
to get the authenticated timestamp of a Fernet token. * Support for Python 2.7.x
without hmac.compare_digest has been deprecated. We will require Python 2.7.7 or
higher (or 2.7.6 on Ubuntu) in the next cryptography release. * Fixed multiple
issues preventing cryptography from compiling against LibreSSL 2.7.x. * Added
get_revoked_certificate_by_serial_number for quick serial number searches in
CRLs. * The RelativeDistinguishedName class now preserves the order of
attributes. Duplicate attributes now raise an error instead of silently
discarding duplicates. * aes_key_unwrap() and aes_key_unwrap_with_padding() now
raise InvalidUnwrap if the wrapped key is an invalid length, instead of
ValueError.
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ChangeLog:

* Wed Jul 18 2018 Christian Heimes <cheimes@redhat.com> – 2.3-1
– New upstream release 2.3
– Fix AEAD tag truncation bug, RHBZ#1602752
* Sun Feb 18 2018 Christian Heimes <cheimes@redhat.com> – 2.0.2-4
– Build requires gcc
* Tue Oct 24 2017 Christian Heimes <cheimes@redhat.com> – 2.0.2-3
– Change Requires to openssl-libs
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References:

[ 1 ] Bug #1602752 – Possible tag truncation security bug in AEAD API
https://bugzilla.redhat.com/show_bug.cgi?id=1602752
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This update can be installed with the “dnf” update program. Use
su -c ‘dnf upgrade –advisory FEDORA-2018-06c24068c6’ at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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