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crypto/tls: reject change_cipher_spec record after handshake in TLS 1.3

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https://github.com/golang/go/pull/58912
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RPRX 2023-03-07 15:19:08 +00:00 committed by GitHub
parent 6f8fa90c03
commit 15efa424b2
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1 changed files with 1 additions and 1 deletions
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2
conn.go
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@ -762,7 +762,7 @@ func (c *Conn) readRecordOrCCS(expectChangeCipherSpec bool) error {
// 5, a server can send a ChangeCipherSpec before its ServerHello, when
// c.vers is still unset. That's not useful though and suspicious if the
// server then selects a lower protocol version, so don't allow that.
if c.vers == VersionTLS13 {
if c.vers == VersionTLS13 && !handshakeComplete {
return c.retryReadRecord(expectChangeCipherSpec)
}
if !expectChangeCipherSpec {