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CVE-2022-0778— OpenSSL 安全漏洞

一分钟漏洞结论

影响对象
OpenSSL OpenSSL
利用判断
存在公开或 AI PoC，应优先验证
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

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。 OpenSSL1.0.2 版本、1.1.1版本和3.0版本存在安全漏洞，该漏洞源于计算模平方根的BN_mod_sqrt() 函数存在错误，可能导致对于非素数模数无线循环。攻击者可以发送特殊的函数参数值利用该漏洞导致应用在解析证书的过程中触发拒绝服务。

AI 预测 5.9 利用难度: 较易 EPSS 73.19% · P99

可能的 ATT&CK 技术 1 AI

T1499 · Endpoint Denial of Service

影响版本矩阵 3

厂商产品 版本范围状态
OpenSSL OpenSSL Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1) affected
Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m) affected
Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc) affected
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一、 漏洞 CVE-2022-0778 基础信息

漏洞信息
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Vulnerability Title
Infinite loop in BN_mod_sqrt() reachable when parsing certificates
来源: CVE Program / CVE List V5
Vulnerability Description
The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
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。 OpenSSL1.0.2 版本、1.1.1版本和3.0版本存在安全漏洞，该漏洞源于计算模平方根的BN_mod_sqrt() 函数存在错误，可能导致对于非素数模数无线循环。攻击者可以发送特殊的函数参数值利用该漏洞导致应用在解析证书的过程中触发拒绝服务。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
OpenSSL OpenSSL Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1) -

二、漏洞 CVE-2022-0778 的公开POC

# POC 描述 源链接 神龙链接
1 Proof of concept for CVE-2022-0778, which triggers an infinite loop in parsing X.509 certificates due to a bug in BN_mod_sqrt https://github.com/drago-96/CVE-2022-0778 POC详情
2 None https://github.com/yywing/cve-2022-0778 POC详情
3 None https://github.com/jkakavas/CVE-2022-0778-POC POC详情
4 Proof of concept for CVE-2022-0778 in P12 and PEM format https://github.com/0xUhaw/CVE-2022-0778 POC详情
5 None https://github.com/Trinadh465/openssl-1.1.1g_CVE-2022-0778 POC详情
6 None https://github.com/jeongjunsoo/CVE-2022-0778 POC详情
7 None https://github.com/hshivhare67/OpenSSL_1.0.1g_CVE-2022-0778 POC详情
8 https://github.com/vulhub/vulhub/blob/master/openssl/CVE-2022-0778/README.md POC详情
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三、漏洞 CVE-2022-0778 的情报信息

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CVE-2022-0778 厂商安全公告 (11)

CVE-2022-0778 公开利用代码 (1)

CVE-2022-0778 邮件列表归档 (7)

CVE-2022-0778 其他参考 (8)

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL

V. Comments for CVE-2022-0778

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