{"id":"CVE-2021-43314","aliases":["DEBIAN-CVE-2021-43314","EUVD-2021-30253","GHSA-qw8f-cj3r-vr8p","UBUNTU-CVE-2021-43314","openSUSE-SU-2023:0088-1"],"status":"published","title":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an...","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00817,"percentile":0.57398,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-787"],"published":"2023-03-24T00:00:00Z","modified":"2026-10-23T18:04:16Z","fixes":[{"ecosystem":"Debian:13","package":"upx-ucl","fixed_in":["4.2.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"upx-ucl","fixed_in":["4.2.2-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.2-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.91-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.94-2","3.94-3","3.94-4"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.95-2","3.95-2build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.96-2","3.96-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.96-3","4.2.2-3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.4-1","4.2.4-1.1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.4-1.1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.4-1.1","4.2.4-1.1build1"]},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP4","package":"upx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.2-bp154.4.6.1"}]}],"bundled":12},{"source":"osv","ecosystem":"openSUSE:Leap 15.4","package":"upx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.2-bp154.4.6.1"}]}],"bundled":12}],"products":[{"vendor":"upx","product":"upx"}],"references":[{"url":"https://github.com/upx/upx/issues/380","tags":["x_transferred","Exploit","Issue Tracking","Patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43314"},{"url":"https://github.com/advisories/GHSA-qw8f-cj3r-vr8p"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-43314","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-43314","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43314","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/XLSYENIWX7YMHJJKVRBH2CPDXM5X3IW6/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1183510","tags":["report"]},{"url":"https://bugzilla.suse.com/1184701","tags":["report"]},{"url":"https://bugzilla.suse.com/1184702","tags":["report"]},{"url":"https://bugzilla.suse.com/1207121","tags":["report"]},{"url":"https://bugzilla.suse.com/1207122","tags":["report"]},{"url":"https://bugzilla.suse.com/1209765","tags":["report"]},{"url":"https://bugzilla.suse.com/1209766","tags":["report"]},{"url":"https://bugzilla.suse.com/1209767","tags":["report"]},{"url":"https://bugzilla.suse.com/1209768","tags":["report"]},{"url":"https://bugzilla.suse.com/1209769","tags":["report"]},{"url":"https://bugzilla.suse.com/1209770","tags":["report"]},{"url":"https://bugzilla.suse.com/1209771","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-20285","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-30500","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-30501","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43311","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43312","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43313","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43314","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43315","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43316","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43317","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-23456","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-23457","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-43314","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T00:00:00Z","modified":"2025-02-25T15:10:26.821Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30253","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T00:00:00Z","modified":"2025-02-25T15:10:26Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"none"}],"updated_at":"2026-11-02T20:53:24.103419Z"}],"ghsa":[{"id":"GHSA-qw8f-cj3r-vr8p","title":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an...","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T21:30:49Z","modified":"2025-04-11T12:32:45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-119","CWE-787"],"updated_at":"2026-11-02T15:01:16.487496Z"}],"nvd":[{"id":"CVE-2021-43314","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T20:15:08.363Z","modified":"2026-06-17T04:10:50.393Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-119","CWE-787"],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"CVE-2021-43314","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T20:15:08.363Z","modified":"2026-10-20T10:55:02.150000711Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"DEBIAN-CVE-2021-43314","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T20:15:08.363Z","modified":"2026-10-23T18:04:16.203663423Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.799676Z"},{"id":"UBUNTU-CVE-2021-43314","description":"A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368","status":"published","published":"2023-03-24T20:15:00Z","modified":"2026-10-17T12:57:14.160866444Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"openSUSE-SU-2023:0088-1","title":"Security update for upx","description":"\nupx was updated to fix the following issues:\n\nUpdate to release 4.0.2\n\n* Fix unpack of ELF x86-64 that failed with 'CantUnpackException: corrupt b_info'\n* Resolve SEGV on PackLinuxElf64::invert_pt_dynamic\n\n- CVE-2021-30500: Fixed Null pointer dereference in PackLinuxElf:canUnpack() in p_lx_elf.cpp\n- CVE-2021-30501: Fixed Assertion abort in function MemBuffer:alloc()\n- CVE-2021-43311: Fixed Heap-based buffer overflow in PackLinuxElf32:elf_lookup() at p_lx_elf.cpp\n- CVE-2021-43312: Fixed Heap-based buffer overflow in PackLinuxElf64:invert_pt_dynamic at p_lx_elf.cpp:5239\n- CVE-2021-43313: Fixed Heap-based buffer overflow in PackLinuxElf32:invert_pt_dynamic at p_lx_elf.cpp:1688\n- CVE-2021-43314: Fixed Heap-based buffer overflows in PackLinuxElf32:elf_lookup() at p_lx_elf.cp\n- CVE-2021-43315: Fixed Heap-based buffer overflows in PackLinuxElf32:elf_lookup() at p_lx_elf.cp\n- CVE-2021-43316: Fixed Heap-based buffer overflow in func get_le64()\n- CVE-2021-43317: Fixed Heap-based buffer overflows in PackLinuxElf64:elf_lookup() at p_lx_elf.cp\n- CVE-2023-23456: Fixed heap-buffer-overflow in PackTmt:pack()\n- CVE-2023-23457: Fixed SEGV on PackLinuxElf64:invert_pt_dynamic() in p_lx_elf.cpp\n","status":"published","published":"2023-04-11T07:07:29Z","modified":"2025-05-07T18:12:22.423988Z","updated_at":"2026-11-02T16:58:32.653274Z"}]}}