CLI

The following CLI interface is provided to facilitate exploitation of CBXP by shell callers.

 

The CLI interface for CBXP can be installed from zopen community using the zopen package manager.

zopen install cbxp

The CLI interface for CBXP may also optionally be downloaded from GitHub.

 

cbxp extract

cbxp extract [flags] <control block>

📄 Description

Extract and format Control Block Data from Live Memory.

🚩 Flags

• -i, --include <pattern>
  Include control blocks that are Accessible from the Root Control Block being extracted using an Include Pattern.

• -f, --filter
  Filter repeated control block data using a Filter.

🌐 Global Flags

• -d, --debug
  Print Debug Messages.

• -h, --help
  Display Usage Information.

💻 Examples

The following example extracts the PSA control block from Live Memory and prints Debug Messages.

Shell Script

cbxp extract -d psa

 

The following example extracts the CVT control block from Live Memory, includes the ECVT control block and the ASVT control block, and includes all Known Control Blocks that are pointed to directly by the ASVT control block.

Shell Script

cbxp extract -i ecvt -i 'asvt.*' cvt

 

The following example extracts all ASSB control blocks from Live Memory where both the Control Block Field ASSBJBNI matches the Filter Value IBMUSER and the Control Block Field ASSBJBNS matches the Filter Value BPXAS. The JSON output is then piped into jq to Format it.

Shell Script

cbxp extract -f assb.assbjbni=IBMUSER assb | jq

cbxp format

cbxp format [flags] <control block>

📄 Description

Format Control Block Data from a File/Pipe.

🚩 Flags

• -F, --file <path>
  Format control block data from a specified File or Pipe.

• -o, --offset <offset>
  Specify an Offset into the provided data to start formatting at.

🌐 Global Flags

• -d, --debug
  Print Debug Messages.

• -h, --help
  Display Usage Information.

💻 Examples

The following example formats CVT control block data from a File and prints Debug Messages.

Shell Script

cbxp format -F cvt.bin -d cvt

 

The following example formats CVT control block data from a Pipe.

Shell Script

cat cvt.bin | cbxp format cvt

 

The following example formats ASCB control block data from a File at an offset of 0x40 bytes.

Shell Script

cbxp format -F ascboffset.bin -o 0x40 ascb

 

The following example formats ASCB control block data from a File at an offset of 64 bytes.

Shell Script

cbxp format -F ascboffset.bin -o 64 ascb