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CVE-2020-26939

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.

Bouncy Castle BC和Bouncy Castle都是Bouncy Castle组织的产品。Bouncy Castle BC是一个用于C＃和Java应用程序的加密库。Bouncy Castle是密码学中使用的API集合。它包括适用于Java和C#编程语言的API 。 Bouncy Castle BC 1.55之前版本的Legion 和BC-FJA 1.0.1.2之前版本存在安全漏洞，该漏洞可使攻击者获取一些敏感信息。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.92% · P58

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2020-26939

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Legion of the Bouncy Castle BC before 1.61 and BC-FJA before 1.0.1.2, attackers can obtain sensitive information about a private exponent because of Observable Differences in Behavior to Error Inputs. This occurs in org.bouncycastle.crypto.encodings.OAEPEncoding. Sending invalid ciphertext that decrypts to a short payload in the OAEP Decoder could result in the throwing of an early exception, potentially leaking some information about the private exponent of the RSA private key performing the encryption.
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
Bouncy Castle BC和Bouncy Castle 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bouncy Castle BC和Bouncy Castle都是Bouncy Castle组织的产品。Bouncy Castle BC是一个用于C＃和Java应用程序的加密库。Bouncy Castle是密码学中使用的API集合。它包括适用于Java和C#编程语言的API 。 Bouncy Castle BC 1.55之前版本的Legion 和BC-FJA 1.0.1.2之前版本存在安全漏洞，该漏洞可使攻击者获取一些敏感信息。
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-2020-26939

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III. Intelligence Information for CVE-2020-26939

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Mailing List Discussions for CVE-2020-26939 (1)

Other References for CVE-2020-26939 (1)

Same Patch Batch · n/a · 2020-11-02 · 12 CVEs total

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CVE-2018-19025 SHUN HU JUUKO Industrial Radio Remote Control 安全漏洞
CVE-2020-24881 Enhancesoft osTicket 代码问题漏洞

IV. Related Vulnerabilities

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

V. Comments for CVE-2020-26939

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