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CVE-2022-3786— X.509 Email Address Variable Length Buffer Overflow

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 3.0.0 到 3.0.6版本存在安全漏洞，该漏洞源于在 X.509 证书验证中可以触发缓冲区溢出，特别是在名称约束检查中，攻击者利用该漏洞可以导致服务崩溃（导致拒绝服务）。

AI Predicted 7.5 Difficulty: Moderate EPSS 92.49% · P100
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I. Basic Information for CVE-2022-3786

Vulnerability Information
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Vulnerability Title
X.509 Email Address Variable Length Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.
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 安全漏洞
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 3.0.0 到 3.0.6版本存在安全漏洞，该漏洞源于在 X.509 证书验证中可以触发缓冲区溢出，特别是在名称约束检查中，攻击者利用该漏洞可以导致服务崩溃（导致拒绝服务）。
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 3.0.0 ~ 3.0.7 -

II. Public POCs for CVE-2022-3786

# POC Description Source Link Shenlong Link
1 Finding CVE-2022-3786 (openssl) with Mayhem https://github.com/WhatTheFuzz/openssl-fuzz POC Details
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III. Intelligence Information for CVE-2022-3786

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Vendor Advisories for CVE-2022-3786 (1)

Other References for CVE-2022-3786 (1)

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL

V. Comments for CVE-2022-3786

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