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Security Bulletin: A vulnerability in Bouncy Castle affects IBM Rational Performance Tester (CVE-2020-26939)

Security Bulletin


Summary

IBM Rational Performance Tester is vulnerable to error inputs in OAEPEncoding, potentially allowing a remote attacker to exploit this vulnerability to obtain sensitive information and use this information to launch further attacks against the affected system.

Vulnerability Details

CVEID:   CVE-2020-26939
DESCRIPTION:   Legion of the Bouncy Castle BC and Legion of the Bouncy Castle BC-FJA could allow a remote attacker to obtain sensitive information, caused by observable differences in behavior to rrror inputs in org.bouncycastle.crypto.encodings.OAEPEncoding. By using the OAEP Decoder to send invalid ciphertext that decrypts to a short payload, a remote attacker could exploit this vulnerability to obtain sensitive information and use this information to launch further attacks against the affected system.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/191108 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
RPT9.5
RPT10.0

Remediation/Fixes

Upgrading to version 10.1.2 is strongly recommended.

ProductVRMFAPARRemediation/First Fix
RPT9.5Nonehttps://download4.boulder.ibm.com/sar/CMA/RAA/09ht2/0/PSIRT-28248-9.5.0.0-ifix.zip
RPT10.0Nonehttps://download4.boulder.ibm.com/sar/CMA/RAA/09ht1/1/PSIRT-28248-10.0.2.1-ifix.zip

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

19 Feb 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSMMM5","label":"IBM Rational Performance Tester"},"Component":"","Platform":[{"code":"PF033","label":"Windows"},{"code":"PF016","label":"Linux"},{"code":"PF002","label":"AIX"}],"Version":"10.1, 10.0, 9.5","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
19 February 2021

Initial Publish date:
19 February 2021

UID

ibm16416215

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