Description
In the Bouncy Castle JCE Provider version 1.55 and earlier DSA signature generation is vulnerable to timing attack. Where timings can be closely observed for the generation of signatures, the lack of blinding in 1.55, or earlier, may allow an attacker to gain information about the signature's k value and ultimately the private value as well.
Remediation
References
https://access.redhat.com/errata/RHSA-2018:2669
https://access.redhat.com/errata/RHSA-2018:2927
https://github.com/bcgit/bc-java/commit/acaac81f96fec91ab45bd0412beaf9c3acd8defa#diff-e75226a9ca49217a7276b29242ec59ce
https://lists.debian.org/debian-lts-announce/2018/07/msg00009.html
https://security.netapp.com/advisory/ntap-20181127-0004/
https://usn.ubuntu.com/3727-1/
https://www.oracle.com/security-alerts/cpuoct2020.html
Related Vulnerabilities
CVE-2016-6794 Vulnerability in maven package org.apache.tomcat:tomcat-util
CVE-2019-10754 Vulnerability in maven package org.apereo.cas:cas-server-core-services-api
CVE-2018-1999003 Vulnerability in maven package org.jenkins-ci.main:jenkins-core
CVE-2016-10735 Vulnerability in maven package org.webjars.bower:bootstrap
CVE-2020-28472 Vulnerability in maven package org.webjars.bower:aws-sdk