{"id":"UBUNTU-CVE-2018-11236","details":"stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.","modified":"2026-04-22T12:46:23.169407Z","published":"2018-05-18T16:29:00Z","related":["USN-4416-1","USN-6762-1"],"upstream":["CVE-2018-11236"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-11236"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4416-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-11236"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6762-1"}],"affected":[{"package":{"name":"eglibc","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.15+esm3?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.19-0ubuntu6.15+esm3"}]}],"versions":["2.17-93ubuntu4","2.18-0ubuntu1","2.18-0ubuntu2","2.18-0ubuntu4","2.18-0ubuntu5","2.18-0ubuntu6","2.18-0ubuntu7","2.19-0ubuntu2","2.19-0ubuntu3","2.19-0ubuntu4","2.19-0ubuntu5","2.19-0ubuntu6","2.19-0ubuntu6.1","2.19-0ubuntu6.3","2.19-0ubuntu6.4","2.19-0ubuntu6.5","2.19-0ubuntu6.6","2.19-0ubuntu6.7","2.19-0ubuntu6.8","2.19-0ubuntu6.9","2.19-0ubuntu6.10","2.19-0ubuntu6.11","2.19-0ubuntu6.13","2.19-0ubuntu6.14","2.19-0ubuntu6.15","2.19-0ubuntu6.15+esm1","2.19-0ubuntu6.15+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"eglibc-source","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc-bin","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc-dev-bin","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-amd64","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-armel","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-dev-amd64","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-dev-armel","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-dev-i386","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-dev-x32","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-i386","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-pic","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-prof","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"libc6-x32","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"multiarch-support","binary_version":"2.19-0ubuntu6.15+esm3"},{"binary_name":"nscd","binary_version":"2.19-0ubuntu6.15+esm3"}],"availability":"Available with Ubuntu Pro (Infra-only): 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subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-11236.json"}},{"package":{"name":"glibc","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/glibc@2.27-3ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.27-3ubuntu1.2"}]}],"versions":["2.26-0ubuntu2","2.26-0ubuntu2.1","2.27-0ubuntu2","2.27-0ubuntu3","2.27-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"glibc-source","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc-bin","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc-dev-bin","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-amd64","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-armel","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-dev-amd64","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-dev-armel","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-dev-i386","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-dev-s390","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-dev-x32","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-i386","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-pic","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-s390","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"libc6-x32","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"locales","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"locales-all","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"multiarch-support","binary_version":"2.27-3ubuntu1.2"},{"binary_name":"nscd","binary_version":"2.27-3ubuntu1.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-11236.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}