    skipString: () => {
      const len = self.readUInt32BE();
      if (len === undefined)
        return;
      pos += len;
      return (pos <= buffer.length ? len : undefined);
    },
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.