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CVE-2020-1968— Raccoon attack

Quick assessment

Affected
OpenSSL OpenSSL
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenSSL是Openssl团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 中存在加密问题漏洞。该漏洞源于DH Pre-master Secret Raccoon。攻击者可利用该漏洞绕过数据访问限制，获取敏感信息。

AI Predicted 5.9 Difficulty: Moderate EPSS 4.90% · P92

Possible ATT&CK Techniques 2 AI

T1042 T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2020-1968

Vulnerability Information
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Vulnerability Title
Raccoon attack
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenSSL是Openssl团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 中存在加密问题漏洞。该漏洞源于DH Pre-master Secret Raccoon。攻击者可利用该漏洞绕过数据访问限制，获取敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenSSL OpenSSL Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v) -

II. Public POCs for CVE-2020-1968

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III. Intelligence Information for CVE-2020-1968

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Vendor Advisories for CVE-2020-1968 (9)

Mailing List Discussions for CVE-2020-1968 (1)

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL

V. Comments for CVE-2020-1968

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