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ethstats: set readlimit on ethstats server connection (#26207)

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This prevents DoS when connected to a malicious ethstats server.
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Martin Holst Swende 2022-11-17 15:33:03 +01:00 committed by GitHub
parent 97c563e055
commit c2e0abce2e
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1 changed files with 3 additions and 0 deletions
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ethstats/ethstats.go
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@ -57,6 +57,8 @@ const (
txChanSize = 4096 txChanSize = 4096
// chainHeadChanSize is the size of channel listening to ChainHeadEvent. // chainHeadChanSize is the size of channel listening to ChainHeadEvent.
chainHeadChanSize = 10 chainHeadChanSize = 10
messageSizeLimit = 15 * 1024 * 1024
) )
// backend encompasses the bare-minimum functionality needed for ethstats reporting // backend encompasses the bare-minimum functionality needed for ethstats reporting
@ -121,6 +123,7 @@ type connWrapper struct {
} }
func newConnectionWrapper(conn *websocket.Conn) *connWrapper { func newConnectionWrapper(conn *websocket.Conn) *connWrapper {
conn.SetReadLimit(messageSizeLimit)
return &connWrapper{conn: conn} return &connWrapper{conn: conn}
} }