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GramJs: Prevent duplicate message ID attack (#1563)

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This commit is contained in:
Alexander Zinchuk 2021-12-10 18:32:20 +01:00
parent 5658a64dab
commit 124d23aca8
1 changed files with 12 additions and 0 deletions
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12
src/lib/gramjs/network/MTProtoState.js
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@ -49,6 +49,7 @@ class MTProtoState {
this.id = undefined;
this._sequence = undefined;
this._lastMsgId = undefined;
this.msgIds = [];
this.reset();
}
@ -60,6 +61,7 @@ class MTProtoState {
this.id = Helpers.generateRandomLong(true);
this._sequence = 0;
this._lastMsgId = BigInt(0);
this.msgIds = [];
}
/**
@ -196,6 +198,16 @@ class MTProtoState {
}
const remoteMsgId = reader.readLong();
// if we get a duplicate message id we should ignore it.
if (this.msgIds.includes(remoteMsgId.toString())) {
throw new SecurityError('Duplicate msgIds');
}
// we only store the latest 500 message ids from the server
if (this.msgIds.length > 500) {
this.msgIds.shift();
}
this.msgIds.push(remoteMsgId.toString());
const remoteSequence = reader.readInt();
const containerLen = reader.readInt(); // msgLen for the inner object, padding ignored
const diff = body.length - containerLen;