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CVE-2017-3730— Bad (EC)DHE parameters cause a client crash

Quick assessment

Affected
OpenSSL OpenSSL
Exploitation
Public or AI PoC available; prioritize validation
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 1.1.0d之前的1.1.0版本中存在代码问题漏洞。攻击者可利用该漏洞造成客户端崩溃（空指针逆向引用）。

AI Predicted 5.3 Difficulty: Easy EPSS 55.29% · P99

Public Exploits 1

ExploitDB · 1 EDB-41192 [dos]
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I. Basic Information for CVE-2017-3730

Vulnerability Information
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Vulnerability Title
Bad (EC)DHE parameters cause a client crash
Source: CVE Program / CVE List V5
Vulnerability Description
In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack.
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 代码问题漏洞
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 1.1.0d之前的1.1.0版本中存在代码问题漏洞。攻击者可利用该漏洞造成客户端崩溃（空指针逆向引用）。
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 openssl-1.1.0 -

II. Public POCs for CVE-2017-3730

# POC Description Source Link Shenlong Link
1 OpenSSL CVE-2017-3730 proof-of-concept https://github.com/guidovranken/CVE-2017-3730 POC Details
2 OpenSSL CVE-2017-3730 proof-of-concept https://github.com/olivierh59500/CVE-2017-3730 POC Details
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III. Intelligence Information for CVE-2017-3730

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Patches & Fixes for CVE-2017-3730 (1)

Vendor Advisories for CVE-2017-3730 (7)

Exploits & Public PoCs for CVE-2017-3730 (1)

Other References for CVE-2017-3730 (1)

Same Patch Batch · OpenSSL · 2017-05-04 · 6 CVEs total

CVE-2016-7053 CMS Null dereference
CVE-2016-7054 ChaCha20/Poly1305 heap-buffer-overflow
CVE-2017-3731 Truncated packet could crash via OOB read
CVE-2017-3732 BN_mod_exp may produce incorrect results on x86_64
CVE-2017-3733 Encrypt-Then-Mac renegotiation crash

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL

V. Comments for CVE-2017-3730

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