Insecure TLS_DHE_PSK_WITH_RC4_128_SHA

IANA name:

TLS_DHE_PSK_WITH_RC4_128_SHA

GnuTLS name:

TLS_DHE_PSK_ARCFOUR_128_SHA1

Hex code:

0x00, 0x8E

TLS Version(s):

TLS1.0, TLS1.1, TLS1.2, TLS1.3

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Protocol:

Transport Layer Security (TLS)

Key Exchange:

PFS Diffie-Hellman Ephemeral (DHE)

DHEat Attack:

The so-called DHEat Attack affects cryptographic protocols using the Diffie Hellman key exchange (incl. TLS). According to its authors, it exploits a potocol particularity that may allow attackers to perform a DoS attack "with a low-bandwidth network connection without authentication, privilege, or user interaction."

Raccoon Attack:

The so-called Raccoon Attack affects the specifications of TLS 1.2 and below when using a DH(E) key exchange. According to the researchers, while very hard to exploit, in rare circumstances this timing attack allows attackers to decrypt the connection between users and the server. A fix has been introduced in the TLS 1.3 specification.

Authentication:

Pre-Shared Key (PSK)

Encryption:

Rivest Cipher 4 with 128bit key (RC4 128)

Rivest Cipher 4:

IETF has officially prohibited RC4 for use in TLS in RFC 7465. Therefore, it can be considered insecure.

Hash:

HMAC Secure Hash Algorithm 1 (SHA)

Secure Hash Algorithm 1:

The Secure Hash Algorithm 1 has been proven to be insecure as of 2017 (see shattered.io).

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Included in RFC:

• RFC 4279

Machine-readable:

application/json