[SECURITY] Fedora 19 Update: perl-Crypt-DSA-1.17-10.fc19

updates at fedoraproject.org updates at fedoraproject.org
Fri Sep 13 01:10:36 UTC 2013

Fedora Update Notification
2013-09-04 23:52:26

Name        : perl-Crypt-DSA
Product     : Fedora 19
Version     : 1.17
Release     : 10.fc19
URL         : http://search.cpan.org/dist/Crypt-DSA/
Summary     : Perl module for DSA signatures and key generation
Description :
Crypt::DSA is an implementation of the DSA (Digital Signature Algorithm)
signature verification system. This package provides DSA signing, signature
verification, and key generation.

Update Information:

As taught by the '09 Debian PGP disaster relating to DSA, the randomness source is extremely important. On systems without /dev/random, Crypt::DSA falls back to using Data::Random. Data::Random uses rand(), about which the perldoc says "rand() is not cryptographically secure. You should not rely on it in security-sensitive situations." In the case of DSA, this is even worse. Using improperly secure randomness sources can compromise the signing key upon signature of a message.
See: http://rdist.root.org/2010/11/19/dsa-requirements-for-random-k-value/
It might seem that this would not affect Linux since /dev/random is always available and so the fall back to Data::Random would never happen. However, if an application is confined using a MAC system such as SELinux then access to /dev/random could be denied by policy and the fall back would be triggered.


* Tue Sep  3 2013 Paul Howarth <paul at city-fan.org> - 1.17-10
- Remove the ability to fall back to the cryptographically-insecure Data::Random
  instead of using /dev/random (#743567, CPAN RT#71421, CVE-2011-3599)
- Don't need to remove empty directories from the buildroot
* Sat Aug  3 2013 Fedora Release Engineering <rel-eng at lists.fedoraproject.org> - 1.17-9
- Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
* Wed Jul 31 2013 Petr Pisar <ppisar at redhat.com> - 1.17-8
- Perl 5.18 rebuild

  [ 1 ] Bug #743567 - CVE-2011-3599 perl-Crypt-DSA: Cryptographically insecure method used for random numbers generation on systems without /dev/random

This update can be installed with the "yum" update program.  Use 
su -c 'yum update perl-Crypt-DSA' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

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

More information about the package-announce mailing list