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關於 /etc/shadow 無效權限的 WHM 警告，“預期：3377602730，實際：0644”

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關於 /etc/shadow 無效權限的 WHM 警告，“預期：3377602730，實際：0644”

我收到了 WHM 實例發送的一些警報訊息，警告我的影子檔案權限無效。然而，實際的權限（0400）似乎是正確的，而且它報告的權限似乎非常大......數字？

從今天早上開始：

/etc/shadow has non default permissions. Expected: 2401450770, Actual: 0400.
Review the permissions on /etc/shadow to ensure they are safe

從今天晚上開始：

/etc/shadow has non default permissions. Expected: 3377602730, Actual: 0400.
Review the permissions on /etc/shadow to ensure they are safe

這些報告的權限意味著什麼，為什麼 WHM 不滿意0400？

答案1

看源碼。嘗試設定權限 0200 或 0600。

sub _check_for_unsafe_permissions {
my ($self) = @_;

my %test_files = (
    '/etc/shadow' => { 'perms' => [ 0200, 0600 ], 'uid' => 0, 'gid' => 0 },
    '/etc/passwd' => { 'perms' => [0644], 'uid' => 0, 'gid' => 0 }
);

for my $file ( keys %test_files ) {
    my $expected_attributes = $test_files{$file};
    my ( $current_mode, $uid, $gid ) = ( stat($file) )[ 2, 4, 5 ];
    my $perms_ok = 0;
    foreach my $allowed_perms ( @{ $expected_attributes->{'perms'} } ) {
        if ( ( $allowed_perms & 07777 ) == ( $current_mode & 07777 ) ) {
            $perms_ok = 1;
            last;
        }
    }
    if ( !$perms_ok ) {
        my $expected_mode = sprintf( "%04o", $expected_attributes->{'perms'} );
        my $actual_mode   = sprintf( "%04o", $current_mode & 07777 );
        $self->add_warn_advice(
            'text'       => ["$file has non default permissions.  Expected: $expected_mode, Actual: $actual_mode."],
            'suggestion' => ["Review the permissions on $file to ensure they are safe"]
        );
    }

    if ( $uid != $expected_attributes->{'uid'} or $gid != $expected_attributes->{'gid'} ) {
        $self->add_warn_advice(
            'text'       => ["$file has non root user and/or group"],
            'suggestion' => ["Review the ownership permissions

預期的權限輸出應該是 4 個字元的八進位格式的值，但看起來 Perl 的 sprint 函數未正確顯示顯示垃圾的多維數組值。

來源（安全顧問位於 WHM 的安全中心 - Cpanel） https://github.com/bdraco/addon_securityadvisor https://github.com/bdraco/addon_securityadvisor/blob/master/pkg/Cpanel/Security/Advisor/Assessors/Permissions.pm

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