{"schemaVersion":3,"id":"MGASA-2021-0533","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated busybox packages fix security vulnerability\n\nA NULL pointer dereference in Busybox's hush applet leads to denial of\nservice when processing a crafted shell command, due to missing validation\nafter a \\x03 delimiter character. This may be used for DoS under very rare\nconditions of filtered command input. (CVE-2021-42376)\n\nAn attacker-controlled pointer free in Busybox's hush applet leads to\ndenial of service and possible code execution when processing a crafted\nshell command, due to the shell mishandling the &&& string. This may be\nused for remote code execution under rare conditions of filtered command\ninput. (CVE-2021-42377)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\ngetvar_i function. (CVE-2021-42378)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nnext_input_file function. (CVE-2021-42379)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nclrvar function. (CVE-2021-42380)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nhash_init function. (CVE-2021-42381)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\ngetvar_s function. (CVE-2021-42382)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nevaluate function. (CVE-2021-42383)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nhandle_special function. (CVE-2021-42384)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nevaluate function. (CVE-2021-42385)\n\nA use-after-free in Busybox's awk applet leads to denial of service and\npossibly code execution when processing a crafted awk pattern in the\nnvalloc function. (CVE-2021-42386)","dates":{"published":"2021-12-02T16:49:28.000Z","modified":"2026-04-16T04:44:44.276Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"mageia","product":"busybox","name":"busybox","label":"busybox","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/busybox","purlType":"rpm","versions":[{"text":"< 1.34.1-1.mga8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.34.1-1.mga8","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2021-0533.html","label":"advisories.mageia.org/MGASA-2021-0533.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=29697","label":"bugs.mageia.org/show_bug.cgi?id=29697","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["WEB"]}],"lineage":{"upstream":["CVE-2021-42376","CVE-2021-42377","CVE-2021-42378","CVE-2021-42379","CVE-2021-42380","CVE-2021-42381","CVE-2021-42382","CVE-2021-42383","CVE-2021-42384","CVE-2021-42385","CVE-2021-42386"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-12-02T16:49:28.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-16T04:44:44.276Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T05:28:39.087Z","stale":false,"partial":false}}