{"id":"UBUNTU-CVE-2021-42374","details":"An out-of-bounds heap read in Busybox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed. This can be triggered by any applet/format that","modified":"2026-01-30T02:17:51.138572Z","published":"2021-11-15T21:15:00Z","related":["USN-5179-1"],"upstream":["CVE-2021-42374"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-42374"},{"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-2021-42374"}],"affected":[{"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":{"availability":"No subscription required","binaries":[{"binary_name":"busybox","binary_version":"1:1.27.2-2ubuntu3.4"},{"binary_version":"1:1.27.2-2ubuntu3.4","binary_name":"busybox-initramfs"},{"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"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42374.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_version":"1:1.30.1-4ubuntu6.4","binary_name":"busybox-static"},{"binary_name":"busybox-syslogd","binary_version":"1:1.30.1-4ubuntu6.4"},{"binary_name":"udhcpc","binary_version":"1:1.30.1-4ubuntu6.4"},{"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-2021-42374.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_name":"udhcpd","binary_version":"1:1.30.1-7ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42374.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}