Bouncy Castle BC/BC-FJA RSA Private Key information exposure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Bouncy Castle BC and BC-FJA. This affects an unknown part of the component RSA Private Key Handler. The manipulation leads to information exposure. This vulnerability is uniquely identified as CVE-2020-26939. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Bouncy Castle BC and BC-FJA (version now known). It has been rated as problematic. This issue affects some unknown processing of the component RSA Private Key Handler. The manipulation with an unknown input leads to a information exposure vulnerability. Using CWE to declare the problem leads to CWE-209. The product generates an error message that includes sensitive information about its environment, users, or associated data. Impacted is confidentiality.

The weakness was disclosed 11/03/2020. The advisory is shared at github.com. The identification of this vulnerability is CVE-2020-26939. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information exposure
CWE: CWE-209 / CWE-200 / CWE-284
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

10/10/2020 🔍
11/03/2020 +24 days 🔍
11/03/2020 +0 days 🔍
07/17/2025 +1717 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-26939 (🔍)
GCVE (CVE): GCVE-0-2020-26939
GCVE (VulDB): GCVE-100-164177

Entryinfo

Created: 11/03/2020 07:45
Updated: 07/17/2025 21:01
Changes: 11/03/2020 07:45 (35), 12/01/2020 09:11 (2), 12/01/2020 09:16 (18), 07/17/2025 21:01 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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