{"id":"UBUNTU-CVE-2021-42382","details":"A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_s function","modified":"2026-01-30T01:47:15.917138Z","published":"2021-11-15T21:15:00Z","related":["USN-5179-1"],"upstream":["CVE-2021-42382"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-42382"},{"type":"REPORT","url":"https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5179-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-42382"}],"affected":[{"package":{"name":"busybox","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/busybox@1:1.21.0-1ubuntu1.4+esm1?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.20.0-8.1ubuntu1","1:1.20.0-9ubuntu1","1:1.20.0-9ubuntu2","1:1.21.0-1ubuntu1","1:1.21.0-1ubuntu1.4","1:1.21.0-1ubuntu1.4+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"busybox","binary_version":"1:1.21.0-1ubuntu1.4+esm1"},{"binary_name":"busybox-initramfs","binary_version":"1:1.21.0-1ubuntu1.4+esm1"},{"binary_name":"busybox-static","binary_version":"1:1.21.0-1ubuntu1.4+esm1"},{"binary_name":"busybox-syslogd","binary_version":"1:1.21.0-1ubuntu1.4+esm1"},{"binary_name":"udhcpc","binary_version":"1:1.21.0-1ubuntu1.4+esm1"},{"binary_name":"udhcpd","binary_version":"1:1.21.0-1ubuntu1.4+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42382.json"}},{"package":{"name":"busybox","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/busybox@1:1.22.0-15ubuntu1.4+esm2?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.22.0-15ubuntu1","1:1.22.0-15ubuntu1.4","1:1.22.0-15ubuntu1.4+esm1","1:1.22.0-15ubuntu1.4+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"busybox","binary_version":"1:1.22.0-15ubuntu1.4+esm2"},{"binary_name":"busybox-initramfs","binary_version":"1:1.22.0-15ubuntu1.4+esm2"},{"binary_name":"busybox-static","binary_version":"1:1.22.0-15ubuntu1.4+esm2"},{"binary_name":"busybox-syslogd","binary_version":"1:1.22.0-15ubuntu1.4+esm2"},{"binary_name":"udhcpc","binary_version":"1:1.22.0-15ubuntu1.4+esm2"},{"binary_name":"udhcpd","binary_version":"1:1.22.0-15ubuntu1.4+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42382.json"}},{"package":{"name":"busybox","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/busybox@1:1.27.2-2ubuntu3.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.27.2-2ubuntu3.4"}]}],"versions":["1:1.22.0-19ubuntu2","1:1.27.2-1ubuntu3","1:1.27.2-1ubuntu4","1:1.27.2-2ubuntu2","1:1.27.2-2ubuntu3","1:1.27.2-2ubuntu3.1","1:1.27.2-2ubuntu3.2","1:1.27.2-2ubuntu3.3"],"ecosystem_specific":{"binaries":[{"binary_name":"busybox","binary_version":"1:1.27.2-2ubuntu3.4"},{"binary_name":"busybox-initramfs","binary_version":"1:1.27.2-2ubuntu3.4"},{"binary_name":"busybox-static","binary_version":"1:1.27.2-2ubuntu3.4"},{"binary_name":"busybox-syslogd","binary_version":"1:1.27.2-2ubuntu3.4"},{"binary_name":"udhcpc","binary_version":"1:1.27.2-2ubuntu3.4"},{"binary_name":"udhcpd","binary_version":"1:1.27.2-2ubuntu3.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42382.json"}},{"package":{"name":"busybox","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/busybox@1:1.30.1-4ubuntu6.4?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.30.1-4ubuntu6.4"}]}],"versions":["1:1.30.1-4ubuntu4","1:1.30.1-4ubuntu5","1:1.30.1-4ubuntu6","1:1.30.1-4ubuntu6.1","1:1.30.1-4ubuntu6.2","1:1.30.1-4ubuntu6.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"busybox","binary_version":"1:1.30.1-4ubuntu6.4"},{"binary_name":"busybox-initramfs","binary_version":"1:1.30.1-4ubuntu6.4"},{"binary_name":"busybox-static","binary_version":"1:1.30.1-4ubuntu6.4"},{"binary_name":"busybox-syslogd","binary_version":"1:1.30.1-4ubuntu6.4"},{"binary_version":"1:1.30.1-4ubuntu6.4","binary_name":"udhcpc"},{"binary_name":"udhcpd","binary_version":"1:1.30.1-4ubuntu6.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42382.json"}},{"package":{"name":"busybox","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/busybox@1:1.30.1-7ubuntu2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.30.1-7ubuntu2"}]}],"versions":["1:1.30.1-6ubuntu3","1:1.30.1-7ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:1.30.1-7ubuntu2","binary_name":"busybox"},{"binary_name":"busybox-initramfs","binary_version":"1:1.30.1-7ubuntu2"},{"binary_name":"busybox-static","binary_version":"1:1.30.1-7ubuntu2"},{"binary_name":"busybox-syslogd","binary_version":"1:1.30.1-7ubuntu2"},{"binary_version":"1:1.30.1-7ubuntu2","binary_name":"udhcpc"},{"binary_version":"1:1.30.1-7ubuntu2","binary_name":"udhcpd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42382.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}