{"id":"UBUNTU-CVE-2021-27737","details":"Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.","modified":"2026-02-12T19:21:34.660231Z","published":"2021-05-14T21:15:00Z","withdrawn":"2026-02-12T16:52:56Z","upstream":["CVE-2021-27737"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-27737"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525%40%3Cannounce.trafficserver.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525@%3Cdev.trafficserver.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525@%3Cannounce.trafficserver.apache.org%3E"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525@%3Cusers.trafficserver.apache.org%3E"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-27737"}],"affected":[{"package":{"name":"trafficserver","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@5.3.0-2ubuntu2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-2ubuntu1","5.3.0-2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"5.3.0-2ubuntu2"},{"binary_name":"trafficserver-dev","binary_version":"5.3.0-2ubuntu2"},{"binary_name":"trafficserver-experimental-plugins","binary_version":"5.3.0-2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27737.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@7.1.2+ds-3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0.0-5","7.1.2+ds-2","7.1.2+ds-2build1","7.1.2+ds-3"],"ecosystem_specific":{"binaries":[{"binary_version":"7.1.2+ds-3","binary_name":"trafficserver"},{"binary_name":"trafficserver-dev","binary_version":"7.1.2+ds-3"},{"binary_version":"7.1.2+ds-3","binary_name":"trafficserver-experimental-plugins"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27737.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@8.0.5+ds-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.0.5+ds-1","8.0.5+ds-2","8.0.5+ds-2build1","8.0.5+ds-2ubuntu1","8.0.5+ds-3","8.0.5+ds-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"8.0.5+ds-3ubuntu0.1~esm1"},{"binary_name":"trafficserver-dev","binary_version":"8.0.5+ds-3ubuntu0.1~esm1"},{"binary_name":"trafficserver-experimental-plugins","binary_version":"8.0.5+ds-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27737.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@9.1.1+ds-2ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.1.1+ds-1.1","9.1.1+ds-2build1","9.1.1+ds-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"9.1.1+ds-2ubuntu0.1~esm1"},{"binary_version":"9.1.1+ds-2ubuntu0.1~esm1","binary_name":"trafficserver-dev"},{"binary_name":"trafficserver-experimental-plugins","binary_version":"9.1.1+ds-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27737.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/trafficserver@9.2.3+ds-1+deb12u1build4?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.1+ds-1build1","9.2.2+ds-1","9.2.3+ds-1","9.2.3+ds-1+deb12u1","9.2.3+ds-1+deb12u1build1","9.2.3+ds-1+deb12u1build3","9.2.3+ds-1+deb12u1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"9.2.3+ds-1+deb12u1build4"},{"binary_version":"9.2.3+ds-1+deb12u1build4","binary_name":"trafficserver-dev"},{"binary_version":"9.2.3+ds-1+deb12u1build4","binary_name":"trafficserver-experimental-plugins"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27737.json"}},{"package":{"name":"trafficserver","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/trafficserver@9.2.5+ds-1ubuntu2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.5+ds-1ubuntu1","9.2.5+ds-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"trafficserver","binary_version":"9.2.5+ds-1ubuntu2"},{"binary_name":"trafficserver-dev","binary_version":"9.2.5+ds-1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