[SECURITY] Fedora EPEL 6 Update: perl-YAML-LibYAML-0.38-4.el6

[updates at fedoraproject.org]

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Fedora EPEL Update Notification
FEDORA-EPEL-2014-0980
2014-03-27 18:47:49
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Name        : perl-YAML-LibYAML
Product     : Fedora EPEL 6
Version     : 0.38
Release     : 4.el6
URL         : http://search.cpan.org/dist/YAML-LibYAML/
Summary     : Perl YAML Serialization using XS and libyaml
Description :
Kirill Siminov's "libyaml" is arguably the best YAML implementation. The C
library is written precisely to the YAML 1.1 specification. It was originally
bound to Python and was later bound to Ruby.

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Update Information:

This update addresses two security issues.

CVE-2013-6393: The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow.

CVE-2014-2525: The library is affected by a heap-based buffer overflow which can lead to arbitrary code execution. The vulnerability is caused by lack of proper expansion for the string passed to the yaml_parser_scan_uri_escapes() function. A specially crafted YAML file, with a long sequence of percent-encoded characters in a URL, can be used to trigger the overflow.
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References:

  [ 1 ] Bug #1078083 - CVE-2014-2525 libyaml: heap-based buffer overflow when parsing URLs
        https://bugzilla.redhat.com/show_bug.cgi?id=1078083
  [ 2 ] Bug #1033990 - CVE-2013-6393 libyaml: heap-based buffer overflow when parsing YAML tags
        https://bugzilla.redhat.com/show_bug.cgi?id=1033990
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This update can be installed with the "yum" update programs.  Use
su -c 'yum update perl-YAML-LibYAML' 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 EPEL 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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