Only one is needed, either Security Update 2008-003 or Mac OS X v10.5.3.
Security Update 2008-003
Security Update 2008-003 is recommended for all users and improves the security of Mac OS X. Previous security updates have been incorporated into this security update. (Not required if you have updated to Mac OS X 10.5.3)
Mac OS X 10.5.3 Update
The Mac OS X 10.5.3 Update is recommended for Mac OS X 10.5, 10.5.1, and 10.5.2 Leopard. It includes general operating system improvements that enhance the stability, compatibility, and security of your Mac. To update to Mac OS X 10.5.3, use Software Update or the standalone installer.
Available for:
Update is recommended for Mac OS X 10.5, 10.5.1, and 10.5.2 Leopard
* PPC [72MB]
* Server PPC [88.9MB]
* Server Universal [118MB]
* Intel [111MB]
Security Update 2008-003 / Mac OS X v10.5.3
- AFP Server : CVE-ID: CVE-2008-1027
- Apache : CVE-ID: CVE-2005-3352, CVE-2005-3357, CVE-2006-3747, CVE-2007-1863, CVE-2007-3847, CVE-2007-4465, CVE-2007-5000, CVE-2007-6388
- AppKit : CVE-ID: CVE-2008-1028
- Apple Pixlet Video : CVE-ID: CVE-2008-1577
- ATS : CVE-ID: CVE-2008-1575
- CFNetwork : CVE-ID: CVE-2008-1580
- CoreFoundation : CVE-ID: CVE-2008-1030
- CoreGraphics : CVE-ID: CVE-2008-1031
- CoreTypes : CVE-ID: CVE-2008-1032
- CUPS : CVE-ID: CVE-2008-1033
- Flash Player Plug-in : CVE-ID: CVE-2007-5275, CVE-2007- 6243, CVE-2007- 6637, CVE-2007-6019, CVE-2007-0071, CVE-2008-1655, CVE-2008-1654
- Help Viewer : CVE-ID: CVE-2008-1034
- iCal : CVE-ID: CVE-2008-1035
- International Components for Unicode : CVE-ID: CVE-2008-1036
- Image Capture : CVE-ID: CVE-2008-1571
- Image Capture : CVE-ID: CVE-2008-1572
- ImageIO : CVE-ID: CVE-2008-1573
- ImageIO : CVE-ID: CVE-2007-5266, CVE-2007-5268, CVE-2007-5269
- ImageIO : CVE-ID: CVE-2008-1574
- Kernel : CVE-ID: CVE-2008-0177
- Kernel : CVE-ID: CVE-2007-6359
- LoginWindow
- Mail : CVE-ID: CVE-2008-1576
- ruby : CVE-ID: CVE-2007-6612
- Single Sign-On : CVE-ID: CVE-2008-1578
- Wiki Server : CVE-ID: CVE-2008-1579