openssl openssl CVE-2020-1968 vulnerability in OpenSSL and Other Products
Published on September 9, 2020

Raccoon attack

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The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites. This issue affects OpenSSL 1.0.2 which is out of support and no longer receiving public updates. OpenSSL 1.1.1 is not vulnerable to this issue. Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v).

Vendor Advisory Vendor Advisory NVD

Vulnerability Analysis

CVE-2020-1968 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Type

What is a Side Channel Attack Vulnerability?

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. Discrepancies can take many forms, and variations may be detectable in timing, control flow, communications such as replies or requests, or general behavior. These discrepancies can reveal information about the product's operation or internal state to an unauthorized actor. In some cases, discrepancies can be used by attackers to form a side channel.

CVE-2020-1968 has been classified to as a Side Channel Attack vulnerability or weakness.


Products Associated with CVE-2020-1968

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2020-1968 are published in these products:

OpenSSL
 
Oracle Peoplesoft Enterprise Peopletools
 
Canonical Ubuntu Linux
 
Debian Linux
 
Oracle Jd Edwards World Security
 

Affected Versions

OpenSSL Version Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v) is affected by CVE-2020-1968

Exploit Probability

EPSS
1.04%
Percentile
77.51%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.