Is there a way to extract all security errata from installed packages using yum?

Issue

• With yum, you can see a list of pending security updates and bugfixes to be installed with yum list-sec

# yum list-sec
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This system is receiving updates from RHN Classic or RHN Satellite.
RHBA-2013:1040 bugfix   bash-3.2-32.el5_9.1.x86_64
RHBA-2013:0885 bugfix   glibc-2.5-107.el5_9.5.i686
RHBA-2013:0885 bugfix   glibc-common-2.5-107.el5_9.5.x86_64
RHBA-2013:0885 bugfix   glibc-devel-2.5-107.el5_9.5.x86_64
RHBA-2013:0885 bugfix   glibc-headers-2.5-107.el5_9.5.x86_64
RHSA-2013:0883 security gnutls-1.4.1-10.el5_9.2.x86_64
RHSA-2013:0847 security kernel-2.6.18-348.6.1.el5.x86_64
RHSA-2013:1034 security kernel-2.6.18-348.12.1.el5.x86_64
RHSA-2013:0847 security kernel-headers-2.6.18-348.6.1.el5.x86_64
RHSA-2013:1034 security kernel-headers-2.6.18-348.12.1.el5.x86_64
RHSA-2013:0942 security krb5-devel-1.6.1-70.el5_9.2.x86_64
RHSA-2013:0942 security krb5-libs-1.6.1-70.el5_9.2.x86_64
RHSA-2013:0942 security krb5-workstation-1.6.1-70.el5_9.2.x86_64
RHBA-2013:0863 bugfix   mkinitrd-5.1.19.6-80.el5_9.i386
RHBA-2013:0863 bugfix   nash-5.1.19.6-80.el5_9.x86_64
RHBA-2013:0885 bugfix   nscd-2.5-107.el5_9.5.x86_64
RHEA-2013:0880 enhancement tzdata-2013c-1.el5.x86_64
RHEA-2013:1025 enhancement tzdata-2013c-2.el5.x86_64

• However, how can I get the same information from installed packages or a single package?
• Looking for a way to extract security errata from installed packages that is more efficient than grepping for CVE's