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Tweak ciphers, fix issue #896 #898

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Sep 21, 2022
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Tweak ciphers, fix issue #896 #898

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9 changes: 3 additions & 6 deletions Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -52,13 +52,10 @@ RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@${PROTOC_GEN_GO_VER}

# Go assets
WORKDIR /go/src/github.com/bishopfox/sliver
ADD ./go-assets.sh /go/src/github.com/bishopfox/sliver/go-assets.sh
RUN ./go-assets.sh

# Compile sliver server
ADD . /go/src/github.com/bishopfox/sliver/
RUN make clean-all \
&& make \
RUN make clean-all
RUN ./go-assets.sh
RUN make \
&& cp -vv sliver-server /opt/sliver-server \
&& /opt/sliver-server unpack --force

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20 changes: 11 additions & 9 deletions server/c2/http.go
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Expand Up @@ -267,17 +267,17 @@ func getHTTPSConfig(conf *HTTPServerConfig) *tls.Config {

// Randomize the cipher suites
allCipherSuites := []uint16{
// tls.TLS_RSA_WITH_RC4_128_SHA, //uint16 = 0x0005
tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA, //uint16 = 0x000a
tls.TLS_RSA_WITH_AES_128_CBC_SHA, //uint16 = 0x002f
tls.TLS_RSA_WITH_AES_256_CBC_SHA, //uint16 = 0x0035
tls.TLS_RSA_WITH_AES_128_CBC_SHA256, //uint16 = 0x003c
tls.TLS_RSA_WITH_AES_128_GCM_SHA256, //uint16 = 0x009c
tls.TLS_RSA_WITH_AES_256_GCM_SHA384, //uint16 = 0x009d
tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, //uint16 = 0xc007
// tls.TLS_RSA_WITH_RC4_128_SHA, //uint16 = 0x0005
tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA, //uint16 = 0x000a
tls.TLS_RSA_WITH_AES_128_CBC_SHA, //uint16 = 0x002f
tls.TLS_RSA_WITH_AES_256_CBC_SHA, //uint16 = 0x0035
tls.TLS_RSA_WITH_AES_128_CBC_SHA256, //uint16 = 0x003c
tls.TLS_RSA_WITH_AES_128_GCM_SHA256, //uint16 = 0x009c
tls.TLS_RSA_WITH_AES_256_GCM_SHA384, //uint16 = 0x009d
// tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, //uint16 = 0xc007
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, //uint16 = 0xc009
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, //uint16 = 0xc00a
// tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA, //uint16 = 0xc011
// tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA, //uint16 = 0xc011
tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, //uint16 = 0xc012
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, //uint16 = 0xc013
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, //uint16 = 0xc014
Expand All @@ -290,6 +290,8 @@ func getHTTPSConfig(conf *HTTPServerConfig) *tls.Config {
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, //uint16 = 0xcca8
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, //uint16 = 0xcca9
}
// CipherSuites ignores the order of the ciphers, this random shuffle
// is truncated resulting in a random selection from all ciphers
insecureRand.Shuffle(len(allCipherSuites), func(i, j int) {
allCipherSuites[i], allCipherSuites[j] = allCipherSuites[j], allCipherSuites[i]
})
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