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[Snyk] Security upgrade tomcat from 8.5.21 to 8.5.77

Sean Clarke requested to merge snyk-fix-09c42e38bff9d7a266c6cfc97e424f74 into master

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this Merge Request

  • Dockerfile

We recommend upgrading to tomcat:8.5.77, as this image has only 103 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity Priority Score / 1000 Issue Exploit Maturity
critical severity 714 Integer Overflow or Wraparound
SNYK-DEBIAN9-LIBIDN20-274945 		No Known Exploit
critical severity 714 Out-of-bounds Read
SNYK-DEBIAN9-LIBXML2-429367 		No Known Exploit
critical severity 778 Loop with Unreachable Exit Condition ('Infinite Loop')
SNYK-DEBIAN9-OPENSSL-2426305 		No Known Exploit
critical severity 714 OS Command Injection
SNYK-DEBIAN9-OPENSSL-2807589 		No Known Exploit
critical severity 714 Out-of-bounds Write
SNYK-DEBIAN9-WGET-342192 		No Known Exploit

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