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CVE-2021-43398

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Crypto++是一款C++加密方法类库 Crypto++(又名Cryptopp) 8.6.0及更早版本存在安全漏洞，该漏洞源于软件在MakePublicKey()中包含一个计时泄漏。私钥执行时间与私钥长度存在明显的相关性，可能导致私钥长度信息的泄露。这可能允许攻击者可利用该漏洞进行计时攻击。

AI Predicted 3.7 Difficulty: Theoretical EPSS 1.96% · P79

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2021-43398

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value
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
Crypto++ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Crypto++是一款C++加密方法类库 Crypto++(又名Cryptopp) 8.6.0及更早版本存在安全漏洞，该漏洞源于软件在MakePublicKey()中包含一个计时泄漏。私钥执行时间与私钥长度存在明显的相关性，可能导致私钥长度信息的泄露。这可能允许攻击者可利用该漏洞进行计时攻击。
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
- n/a n/a -

II. Public POCs for CVE-2021-43398

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III. Intelligence Information for CVE-2021-43398

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Other References for CVE-2021-43398 (3)

Same Patch Batch · n/a · 2021-11-04 · 12 CVEs total

CVE-2021-43400 BlueZ 资源管理错误漏洞
CVE-2020-25367 D-Link DIR-823G 命令注入漏洞
CVE-2020-25366 D-Link DIR-823G 安全漏洞
CVE-2020-25368 D-Link DIR-823G 命令注入漏洞
CVE-2021-42624 Miniftpd 安全漏洞
CVE-2021-43281 MyBB 代码注入漏洞
CVE-2021-43293 Sonatype Nexus Repository 代码问题漏洞
CVE-2021-43389 Linux kernel 缓冲区错误漏洞
CVE-2020-21139 EC Cloud E-Commerce System 跨站请求伪造漏洞
CVE-2021-43396 GNU C Library 安全漏洞
CVE-2021-42057 obsidian-dataview 代码注入漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-43398

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