Sicherheit: Zwei Probleme in botan2
Aktuelle Meldungen Distributionen
Name: Zwei Probleme in botan2
ID: FEDORA-2018-98ab6b4e56
Distribution: Fedora
Plattformen: Fedora 27
Datum: Mi, 11. Juli 2018, 22:51
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0495
Applikationen: botan


Fedora Update Notification
2018-07-11 19:27:57.419836

Name : botan2
Product : Fedora 27
Version : 2.7.0
Release : 1.fc27
URL : https://botan.randombit.net/
Summary : Crypto and TLS for C++11
Description :
Botan is a BSD-licensed crypto library written in C++. It provides a
wide variety of basic cryptographic algorithms, X.509 certificates and
CRLs, PKCS \#10 certificate requests, a filter/pipe message processing
system, and a wide variety of other features, all written in portable
C++. The API reference, tutorial, and examples may help impart the
flavor of the library. This is the current stable release branch 2.x
of Botan.

Update Information:

Update Botan2 to 2.7.0. Focus of this release is on performance and side
channel hardening. - Address side channels in RSA key generation and ECDSA
signing - Side channel hardening in many core algorithms (modular
exponentiation, ECC scalar multiply, Karatsuba multiplication, Barrett
reduction, etc) to reduce the risk of future exploitable side channels. - Many
optimizations for ECC operations, RSA (including key gen), DSA, DH, and XMSS.
Typical speedups vs 2.6.0 is 10 to 40% depending on operation and key size. -
Add Scrypt password hashing. Also supported is using Scrypt to derive keys for
private key encryption (format compatible with upcoming OpenSSL 1.1.1) - Add
base32 encoding/decoding - Plus many bug fixes and smaller enhancements
documented in the [release

[ 1 ] Bug #1591831 - CVE-2018-12435 botan: memory-cache side-channel attack
on ECDSA signatures
[ 2 ] Bug #1591163 - CVE-2018-0495 openssl: ROHNP - Key Extraction Side
Channel in Multiple Crypto Libraries

This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2018-98ab6b4e56' at the command
line. For more information, refer to the dnf documentation available at

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