MetaDirectory
- Adobe
Security bulletins and technical briefs that provide information to customers.
- AIX
Security and other patches for AIX. Note that this is an FTP site.
- AIX Patches - Fixdist
You need the "fixdist" program to install AIX patches.
- Apache Web Server
Advisories and patches.
- Cisco
Patches and advisories for Cisco products
- Citrix
Security bulletins and hotfixes for Citrix products
- Compaq
Patches and advisories for most Compaq products.
- Debian: Security Information
Details of current and archive security advisories. Includes mailing list and a security FAQ.
- FreeBSD
Advisories, mailing lists, tips, tricks, guidelines, links.
- FreeBSD Patches FTP Site
Security advisories and patches.
- HP: IT Resource Center
Americas/Asia-Pacific site offering online support. Includes knowledge base, patches, drivers and security mailing lists.
- HP: Tru64 Unix
Security advisories and associated patches.
- HP-UX Patch Additional Information
Patch Security Matrix, list of obsolete patches, patch checksums.
- KDE
Only if you've built KDE yourself; otherwise probably available from your linux distribution vendor's patches directory. Note this is an FTP site.
- Microsoft
Download security updates, service packs, and anti-spyware tools for Windows.
- Microsoft Security
Microsoft-product-related security headlines and bulletins.
- NetBSD
Advisories, patches, links.
- Netscape
Security alerts for netscape client and server software.
- OpenBSD Release Errata
Advisories and patches.
- OpenBSD Security
Advisories and information.
- Oracle
Patches and other security information.
- Red Hat Linux Errata
Security advisories and updates (patches) for all supported versions.
- Red Hat Linux Security Resource Center
Alerts, whitepapers, articles, presentations, and tools.
- SCO
Security information for Caldera OpenLinux, OpenServer, OpenUnix, and UnixWare.
- SCO Unix System Security Enhancement Area
Advisories and patches. Note this is an FTP site.
- SGI: IRIX
Security advisories and patch downloads. Includes mailing list.
- Sun Microsystems
Security and recommended patches for Solaris: patch clusters and individual patches.
- SuSE Linux
Patches directories for all supported versions, plus a security announcements list (English).
