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CVE-2022-4304— Timing Oracle in RSA Decryption

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。 Open SSL存在安全漏洞，该漏洞源于在RSA解密实现中存在基于时间的侧信道，这可以在Bleichenbacher式攻击中跨网络恢复密文。

AI Predicted 5.9 Difficulty: Hard EPSS 16.20% · P97

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2022-4304

Vulnerability Information
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Vulnerability Title
Timing Oracle in RSA Decryption
Source: CVE Program / CVE List V5
Vulnerability Description
A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.
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。 Open SSL存在安全漏洞，该漏洞源于在RSA解密实现中存在基于时间的侧信道，这可以在Bleichenbacher式攻击中跨网络恢复密文。
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 ~ 3.0.8 -

II. Public POCs for CVE-2022-4304

# POC Description Source Link Shenlong Link
1 None https://github.com/Trinadh465/Openssl-1.1.1g_CVE-2022-4304 POC Details
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III. Intelligence Information for CVE-2022-4304

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Vendor Advisories for CVE-2022-4304 (1)

Same Patch Batch · OpenSSL · 2023-02-08 · 7 CVEs total

CVE-2022-4450 Double free after calling PEM_read_bio_ex
CVE-2023-0215 Use-after-free following BIO_new_NDEF
CVE-2023-0216 Invalid pointer dereference in d2i_PKCS7 functions
CVE-2023-0217 NULL dereference validating DSA public key
CVE-2023-0286 X.400 address type confusion in X.509 GeneralName
CVE-2023-0401 NULL dereference during PKCS7 data verification

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL

V. Comments for CVE-2022-4304

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