Add arch/platform detection for Postgres

[cgranleese-r7]

This PR adds architecture and platform detection for PostgreSQL sessions by using a query.

Before

After

Verification

Docker target:

docker run -it -p 5432:5432 -e POSTGRES_PASSWORD=password postgres:16.1

Commands to target:

use postgres_login
run rhost=127.0.0.1 rport=5432 username=postgres password=password database=template1 createsession=true

• Start msfconsole
• Run the above commands
• Verify the sessions output now contains the appropriate arch and platform
• Verify the code changes are sane

[cgranleese-r7]

Taken from https://postgrespro.com/docs/postgresql/16/supported-platforms

I have bucket these by what I have covered versus not. Wanted to call this out in case anyone has thoughts or opinions.

Historical versions. Not covered and not present in rex/arch.rb:

• Alpha
• Itanium
• M32R
• M68K
• M88K
• NS32K
• SuperH
• VAX

17.6 supported but not covered in rex/arch.rb:

• S/390
• RISC-V
• PA-RISC

17.6 supported and covered in rex/arch.rb:

• x86
• SPARC
• ARM
• MIPS
• PowerPC

[cgranleese-r7]

Taken from https://postgrespro.com/docs/postgresql/16/supported-platforms

I have bucket these by what I have covered versus not. Wanted to call this out in case anyone has thoughts or opinions.

Historical versions. Not covered and not present in lib/msf/core/module/platform.rb:

• 4.3BSD
• BEOS
• BSD/OS
• DG/UX
• Dynix
• NeXTSTEP
• QNX
• SCO
• SINIX
• Sprite
• SunOS
• Tru64 UNIX
• ULTRIX

Historical versions. Covered and present in lib/msf/core/module/platform.rb:

• HP-UX
• IRIX

17.6 supported but not covered in lib/msf/core/module/platform.rb:

• DragonFlyBSD
• illumos

17.6 supported and covered in lib/msf/core/module/platform.rb:

• Linux
• Windows
• Solaris
• macOS
• FreeBSD
• OpenBSD
• NetBSD
• AIX

[cgranleese-r7]

Adding this to return whatever the query result is, evening if we don't mp it, I think it would be more useful to give the user the data instead of just Msf::Platform::Unknown returning unknown.

Maybe we need to return unknown here, happy to change it if needed 👍

[cgranleese-r7]

Same thought process as https://github.com/rapid7/metasploit-framework/pull/19080/files#r1562403615

[cgranleese-r7]

Had to go with querying here, as the client data for the version doesn't contain the required information. It appears to be shortened.

[1] pry(#<Msf::Db::PostgresPR::Connection>)> self
=> #<Msf::Db::PostgresPR::Connection:0x00007fe889d5ed40
 @conn=#<Socket:fd 15>,
 @params=
  {"username"=>"postgres",
   "database"=>"template1",
   "in_hot_standby"=>"off",
   "integer_datetimes"=>"on",
   "TimeZone"=>"Etc/UTC",
   "IntervalStyle"=>"postgres",
   "is_superuser"=>"on",
   "application_name"=>"",
   "default_transaction_read_only"=>"off",
   "scram_iterations"=>"4096",
   "DateStyle"=>"ISO, MDY",
   "standard_conforming_strings"=>"on",
   "session_authorization"=>"postgres",
   "client_encoding"=>"UTF8",
   "server_version"=>"16.1 (Debian 16.1-1.pgdg120+1)", <--- HERE
   "server_encoding"=>"UTF8"},
 @transaction_status=73>
[2] pry(#<Msf::Db::PostgresPR::Connection>)> query('select version()').rows
=> [["PostgreSQL 16.1 (Debian 16.1-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit"]]

[adfoster-r7]

Release Notes

Adds architecture and platform detection for PostgreSQL sessions