6.5.3

dist/elliptic.js

@@ -2560,11 +2560,24 @@ function getLength(buf, p) {
  return initial;
  }
  var octetLen = initial & 0xf;
+
+ // Indefinite length or overflow
+ if (octetLen === 0 || octetLen > 4) {
+ return false;
+ }
+
  var val = 0;
  for (var i = 0, off = p.place; i < octetLen; i++, off++) {
  val <<= 8;
  val |= buf[off];
+ val >>>= 0;
  }
+
+ // Leading zeroes
+ if (val <= 0x7f) {
+ return false;
+ }
+
  p.place = off;
  return val;
 }
@@ -2588,28 +2601,47 @@ Signature.prototype._importDER = function _importDER(data, enc) {
  return false;
  }
  var len = getLength(data, p);
+ if (len === false) {
+ return false;
+ }
  if ((len + p.place) !== data.length) {
  return false;
  }
  if (data[p.place++] !== 0x02) {
  return false;
  }
  var rlen = getLength(data, p);
+ if (rlen === false) {
+ return false;
+ }
  var r = data.slice(p.place, rlen + p.place);
  p.place += rlen;
  if (data[p.place++] !== 0x02) {
  return false;
  }
  var slen = getLength(data, p);
+ if (slen === false) {
+ return false;
+ }
  if (data.length !== slen + p.place) {
  return false;
  }
  var s = data.slice(p.place, slen + p.place);
- if (r[0] === 0 && (r[1] & 0x80)) {
- r = r.slice(1);
+ if (r[0] === 0) {
+ if (r[1] & 0x80) {
+ r = r.slice(1);
+ } else {
+ // Leading zeroes
+ return false;
+ }
  }
- if (s[0] === 0 && (s[1] & 0x80)) {
- s = s.slice(1);
+ if (s[0] === 0) {
+ if (s[1] & 0x80) {
+ s = s.slice(1);
+ } else {
+ // Leading zeroes
+ return false;
+ }
  }
 
  this.r = new BN(r);
@@ -8798,7 +8830,7 @@ utils.encode = function encode(arr, enc) {
 },{}],35:[function(require,module,exports){
 module.exports={
  "name": "elliptic",
- "version": "6.5.2",
+ "version": "6.5.3",
  "description": "EC cryptography",
  "main": "lib/elliptic.js",
  "files": [

package.json

@@ -1,6 +1,6 @@
 {
  "name": "elliptic",
- "version": "6.5.2",
+ "version": "6.5.3",
  "description": "EC cryptography",
  "main": "lib/elliptic.js",
  "files": [