89849 : TLS / DTLS Protocol CBC-mode Ciphersuite Distinguishing Attack Information Disclosure Weakness
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Timeline

Disclosure Date
2013-02-07

Description

The TLS and DTLS protocols are vulnerable to an information disclosure weakness. The issue is due to a distinguishing attack against the MEE-TLS-CBC ciphersuite construction as used in TLS / DTLS. This form of cryptanalysis allows an attacker to choose pairs of messages, one encrypted, one the resulting ciphertext, to determine specific information about the messages. This may allow them to distinguish the traffic from random data, making subsequent cryptanalysis more efficient. In addition, this may also allow the attacker to determine the encryption method used, some information about the encrypted message, or ultimately narrow the key space.

Classification

Location: Context Dependent
Attack Type: Cryptographic
Impact: Loss of Confidentiality
Solution: Upgrade
Exploit: Exploit Public
Disclosure: Vendor Verified
OSVDB: Web Related

Solution

PolarSSL users can upgrade to version 1.2.5 or higher (2013-02-03). BouncyCastle users can upgrade to version 1.48 (2013-02-11).

Products

The OpenSSL Project
OpenSSL
1.0.1c
1.0.0j
0.9.8x
Mozilla Organization
Network Security Services (NSS)
3.14.1
GnuTLS
GnuTLS
2.12.22
3.0.27
3.1.6
Offspark B.V.
PolarSSL
1.2.4
Sawtooth Consulting Limited
CyaSSL
2.4.6
Opera Software ASA
Opera
12.12
Legion of the Bouncy Castle
Bouncy Castle
1.47
IBM Corporation
QRadar Security Information and Event Manager
7.1
7.1MR1
7.1MR2
QRadar Risk Manager
7.1
7.1MR1
7.1MR2

References

Credit

CVSSv2 Score

CVSSv2 Base Score = 4.0
Source: nvd.nist.gov | Generated: 2013-02-11 | Disagree? | There are 1 more: View All

Access_vector_2 Access_complexity_0 Authentication_2 Confidentiality_impact_1 Integrity_impact_1 Availability_impact_0

Comments

No Comments.

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