{"id":"UBUNTU-CVE-2020-1968","details":"The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites. This issue affects OpenSSL 1.0.2 which is out of support and no longer receiving public updates. OpenSSL 1.1.1 is not vulnerable to this issue. Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v).","modified":"2026-04-27T16:22:08.634509Z","published":"2020-09-09T00:00:00Z","related":["USN-4504-1","USN-7018-1"],"upstream":["CVE-2020-1968"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-1968"},{"type":"REPORT","url":"https://www.openssl.org/news/secadv/20200909.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4504-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-1968"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7018-1"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.27+esm10?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1f-1ubuntu2.27+esm10"}]}],"versions":["1.0.1e-3ubuntu1","1.0.1e-4ubuntu1","1.0.1e-4ubuntu2","1.0.1e-4ubuntu3","1.0.1e-4ubuntu4","1.0.1f-1ubuntu1","1.0.1f-1ubuntu2","1.0.1f-1ubuntu2.1","1.0.1f-1ubuntu2.2","1.0.1f-1ubuntu2.3","1.0.1f-1ubuntu2.4","1.0.1f-1ubuntu2.5","1.0.1f-1ubuntu2.7","1.0.1f-1ubuntu2.8","1.0.1f-1ubuntu2.11","1.0.1f-1ubuntu2.12","1.0.1f-1ubuntu2.15","1.0.1f-1ubuntu2.16","1.0.1f-1ubuntu2.17","1.0.1f-1ubuntu2.18","1.0.1f-1ubuntu2.19","1.0.1f-1ubuntu2.20","1.0.1f-1ubuntu2.21","1.0.1f-1ubuntu2.22","1.0.1f-1ubuntu2.23","1.0.1f-1ubuntu2.24","1.0.1f-1ubuntu2.25","1.0.1f-1ubuntu2.26","1.0.1f-1ubuntu2.27","1.0.1f-1ubuntu2.27+esm1","1.0.1f-1ubuntu2.27+esm2","1.0.1f-1ubuntu2.27+esm3","1.0.1f-1ubuntu2.27+esm4","1.0.1f-1ubuntu2.27+esm5","1.0.1f-1ubuntu2.27+esm6","1.0.1f-1ubuntu2.27+esm7","1.0.1f-1ubuntu2.27+esm9"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.1f-1ubuntu2.27+esm10","binary_name":"libssl1.0.0"},{"binary_version":"1.0.1f-1ubuntu2.27+esm10","binary_name":"openssl"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1968.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.17?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.17"}]}],"versions":["1.0.2d-0ubuntu1","1.0.2d-0ubuntu2","1.0.2e-1ubuntu1","1.0.2f-2ubuntu1","1.0.2g-1ubuntu2","1.0.2g-1ubuntu3","1.0.2g-1ubuntu4","1.0.2g-1ubuntu4.1","1.0.2g-1ubuntu4.2","1.0.2g-1ubuntu4.4","1.0.2g-1ubuntu4.5","1.0.2g-1ubuntu4.6","1.0.2g-1ubuntu4.8","1.0.2g-1ubuntu4.9","1.0.2g-1ubuntu4.10","1.0.2g-1ubuntu4.11","1.0.2g-1ubuntu4.12","1.0.2g-1ubuntu4.13","1.0.2g-1ubuntu4.14","1.0.2g-1ubuntu4.15","1.0.2g-1ubuntu4.16"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.2g-1ubuntu4.17","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2g-1ubuntu4.17","binary_name":"openssl"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1968.json"}},{"package":{"name":"edk2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/edk2@0~20160408.ffea0a2c-2ubuntu0.2+esm3?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20150106.5c2d456b-2","0~20160104.c2a892d7-1","0~20160408.ffea0a2c-2","0~20160408.ffea0a2c-2ubuntu0.1","0~20160408.ffea0a2c-2ubuntu0.2","0~20160408.ffea0a2c-2ubuntu0.2+esm1","0~20160408.ffea0a2c-2ubuntu0.2+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"0~20160408.ffea0a2c-2ubuntu0.2+esm3","binary_name":"ovmf"},{"binary_version":"0~20160408.ffea0a2c-2ubuntu0.2+esm3","binary_name":"qemu-efi"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1968.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:Pro:FIPS:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.fips.4.17.1?arch=source&distro=fips-updates/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.fips.4.17.1"}]}],"versions":["1.0.2g-1ubuntu4.fips.4.9.1","1.0.2g-1ubuntu4.fips.4.13.1","1.0.2g-1ubuntu4.fips.4.15.1","1.0.2g-1ubuntu4.fips.4.16.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.2g-1ubuntu4.fips.4.17.1","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2g-1ubuntu4.fips.4.17.1","binary_name":"libssl1.0.0-hmac"},{"binary_version":"1.0.2g-1ubuntu4.fips.4.17.1","binary_name":"openssl"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1968.json"}},{"package":{"name":"openssl","ecosystem":"Ubuntu:Pro:FIPS:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.fips.4.6.3?arch=source&distro=fips/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.2g-1ubuntu4.fips.4.6~ppa1","1.0.2g-1ubuntu4.fips.4.6~ppa2","1.0.2g-1ubuntu4.fips.4.6~ppa3","1.0.2g-1ubuntu4.fips.4.6","1.0.2g-1ubuntu4.fips.4.6.1","1.0.2g-1ubuntu4.fips.4.6.2","1.0.2g-1ubuntu4.fips.4.6.3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.2g-1ubuntu4.fips.4.6.3","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2g-1ubuntu4.fips.4.6.3","binary_name":"libssl1.0.0-hmac"},{"binary_version":"1.0.2g-1ubuntu4.fips.4.6.3","binary_name":"openssl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1968.json"}},{"package":{"name":"openssl1.0","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openssl1.0@1.0.2n-1ubuntu5.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2n-1ubuntu5.4"}]}],"versions":["1.0.2n-1ubuntu2","1.0.2n-1ubuntu3","1.0.2n-1ubuntu4","1.0.2n-1ubuntu5","1.0.2n-1ubuntu5.1","1.0.2n-1ubuntu5.2","1.0.2n-1ubuntu5.3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.2n-1ubuntu5.4","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2n-1ubuntu5.4","binary_name":"openssl1.0"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-1968.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}