Knowledge Base

Cipher Suite

C

TLS_­RSA_­FIPS_­WITH_­3DES_­EDE_­CBC_­SHA

Summary

Name:
TLS_RSA_FIPS_WITH_3DES_EDE_CBC_SHA
IANA Name:
TLS_RSA_FIPS_WITH_3DES_EDE_CBC_SHA
Code:
(0xfe, 0xff)
OpenSSL Name:
Protocol Versions:
TLS 1.0,TLS 1.1,TLS 1.2

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Components

C
Key Exchange Method
Name

RSA (Rivest-Shamir-Adleman)

Security

RSA[443][444] key exchange is a key exchange[133] that has no forward secrecy[127][128][129][130], and does not protect past sessions against future compromises. If long-term secret keys or passwords are compromised, encrypted communications and sessions recorded in the past can be retrieved and decrypted. Throughout its history RSA encryption has had many security flaws[445][446][447][448][449][450] and was affected by variety of attack types: chosen-ciphertext attack[55] (eg: Bleichenbacher's attack[1][2], ROBOT attack[18][19][20][21]), side-channel attack[69][70][71] (eg: padding oracle attack[63][64][65][66], like Bleichenbacher's cat[3][4][5][6]).

Recommendations

Always prefer cipher suites with PFS property over the non-PFS ones. Note that performance considerations implies preferring Ephemeral Elliptic-curve Diffie–Hellman[432][433] over Ephemeral Diffie-Hellman[405][406][407][408].

A+
Authentication Method
Name

RSA

Security

Rivest–Shamir–Adleman[275][276][277] is a digital signature[107][108][109][110] algorithm, which is considered secure, however there are known weaknesses[278][279][280][281][282].

C
Encryption Type
Name

3DES EDE

Security

Encryption algorithm Triple DES[295][296][297] is a block cipher[78][79][80][81] which is still recognized as secure, but deprecated. It has multiple vulnerabilities[298][299][300][301] (eg: sweet32 attack[22][23][24][25], meet-in-the-middle attack[62], brute-force attack[54]) and it is considered as weak and disallowed by National Institute of Standards and Technology[470][471] after 2023.

Recommendations

Remove the cipher suite from the list of cipher suites supported by your server.

B
Encryption Mode
Name

CBC

Security

Encryption mode is cipher block chaining[28][29][30]. It is vulnerable[31] to timing attack[188] (eg: Lucky Thirteen attack[11][12]) and padding oracle attack[63][64][65][66] (eg: POODLE attack[13][14][15]).

Recommendations

Remove the cipher suite from the list of cipher suites supported by your server or at least set the cipher suite order explicitly and any cipher suite modes be preferred over ciphers suites with CBC modes.

A+
Encryption Key Size
Name

128

Security

The symmetric key[185][186][187] withkey size[184] more than 128 bits as it is should be according to National Institute of Standards and Technology[470][471] so it is not vulnerable to preimage attack[67] and it cannreliably prove that message came from the stated sender (its authenticity) and has not been changed, so connection is not open for a man-in-the-middle attack[61].

Recommendations

Remove the cipher suite from the list of cipher suites supported by your server.

C
Encryption Block Size
Name

64

Security

Any block cipher[78][79][80][81] uses a block size[87] of 64 bits is vulnerable to sweet32 attack[22][23][24][25].

Recommendations

Remove the cipher suite from the list of cipher suites supported by your server, or setup yout server to enforce changing session key regularly (rekeying[174]).

A-
Message Authentication Code
Name

SHA-1

Security

message authentication code[135][136][137][138] is a hashed message authentication code[139][140][141][142][143][144][145] which is considered secure[462], despite the fact that the underlayingcryptographic hash function[94][95][96][97] (Secure Hash Algorithm 1[202][203][204]) is considered insecure[205][206][207][208][209][210][211].

Recommendations

If your application or requirements specifically call for the use of a message authentication code[135][136][137][138] that does not provide authenticated encryption[74] prefer block cipher mode of operation[82][83][84][85][86] (eg: counter with CBC-MAC[32][33][34], Galois/Counter Mode[46][47][48][49] or message authentication code[135][136][137][138] (eg: Poly1305[458][459]) that proved authenticated encryption over the ones which does not provide it. In case of a hashed message authentication code[139][140][141][142][143][144][145] prefer message authentication code[135][136][137][138] based on Secure Hash Algorithm 2[212][213][214] over the ones based on Secure Hash Algorithm 1[202][203][204].