{"id":"CVE-2018-11243","aliases":["BELL-CVE-2018-11243","DEBIAN-CVE-2018-11243","EUVD-2018-3283","GHSA-xvcg-hv6h-729g","MGASA-2020-0096","UBUNTU-CVE-2018-11243","openSUSE-SU-2020:0162-1","openSUSE-SU-2020:0163-1","openSUSE-SU-2020:0179-1","openSUSE-SU-2020:0180-1","openSUSE-SU-2024:11477-1","openSUSE-SU-2024:11486-1"],"status":"published","title":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of...","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","severity":{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.02379,"percentile":0.8398,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-415"],"published":"2018-05-18T17:00:00Z","modified":"2026-10-23T18:03:18Z","fixes":[{"ecosystem":"Debian:13","package":"upx-ucl","fixed_in":["1.03+repack-5"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"upx-ucl","fixed_in":["1.03+repack-5"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.1","package":"ucl","fixed_in":["1.03-lp151.3.3.1"],"sources":["osv"]},{"ecosystem":"SUSE:Package Hub 15 SP1","package":"ucl","fixed_in":["1.03-bp151.4.3.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"ucl","fixed_in":["1.03-4.9"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.03+repack-5"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"upx-ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.03+repack-5"}]}]},{"source":"osv","ecosystem":"Mageia:7","package":"upx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.96-1.mga7"}]}],"bundled":5},{"source":"osv","ecosystem":"Mageia:7","package":"ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.03-16.1.mga7"}]}],"bundled":5},{"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":"openSUSE:Leap 15.1","package":"ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.03-lp151.3.3.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.1","package":"upx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.96-lp151.3.3.1"}]}],"bundled":5},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP1","package":"ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.03-bp151.4.3.1"}]}]},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP1","package":"upx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.96-bp151.4.3.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"ucl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.03-4.9"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"upx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.96-3.2"}]}],"bundled":7}],"products":[{"vendor":"upx","product":"upx"}],"references":[{"url":"https://github.com/upx/upx/issues/206","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://github.com/upx/upx/blob/devel/NEWS","tags":["x_refsource_MISC","x_transferred","Release Notes","advisory","report"]},{"url":"https://github.com/upx/upx/issues/207","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00001.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00008.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-11243"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE"},{"url":"https://github.com/advisories/GHSA-xvcg-hv6h-729g"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2018-11243","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-11243","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2020-0096.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=26172","tags":["report"]},{"url":"https://lists.opensuse.org/opensuse-updates/2020-02/msg00012.html","tags":["web"]},{"url":"https://lists.opensuse.org/opensuse-updates/2020-02/msg00006.html","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2018-11243","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-11243","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/WOYIEDUFQ75CISWERGR7TZRONHWHWKB5/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1094138","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-11243","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/JFT4W6K4YZYWDA7IJZTH4U4XTFAQHQYY/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1141777","tags":["report"]},{"url":"https://bugzilla.suse.com/1143839","tags":["report"]},{"url":"https://bugzilla.suse.com/1159833","tags":["report"]},{"url":"https://bugzilla.suse.com/1159920","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2019-1010048","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-14296","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-20021","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-20053","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/PT5FPE7EN4C54B73OL4YNMHARLRLOOFK/","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/PCHFXHDFQGPZW5PCPH6CZNEYQDQLG3GR/","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2017-16869","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-24119","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2018-11243","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2018-05-18T17:00:00Z","modified":"2024-08-05T08:01:52.81Z","updated_at":"2026-11-02T14:35:09.908186Z"}],"euvd":[{"id":"EUVD-2018-3283","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2018-05-18T17:00:00Z","modified":"2024-08-05T08:01:52Z","updated_at":"2026-11-03T02:39:56.043234Z"}],"ghsa":[{"id":"GHSA-xvcg-hv6h-729g","title":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of...","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2022-05-13T01:28:42Z","modified":"2025-04-11T12:32:45Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T15:01:16.487496Z"}],"nvd":[{"id":"CVE-2018-11243","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2018-05-18T17:29:00.247Z","modified":"2026-06-17T01:35:34.17Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:04:27.507872Z"}],"osv":[{"id":"BELL-CVE-2018-11243","title":"CVE-2018-11243 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:13:43.362628Z","modified":"2026-01-26T09:49:52.804923Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:14.701973Z"},{"id":"CVE-2018-11243","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2018-05-18T17:29:00.247Z","modified":"2026-10-20T10:50:17.132656972Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:07.641418Z"},{"id":"DEBIAN-CVE-2018-11243","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2018-05-18T17:29:00.247Z","modified":"2026-10-23T18:03:18.540291497Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:29.988046Z"},{"id":"UBUNTU-CVE-2018-11243","description":"PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.","status":"published","published":"2018-05-18T17:29:00Z","modified":"2026-10-17T12:53:32.247774244Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:16.544091Z"},{"id":"MGASA-2020-0096","title":"Updated upx packages fix security vulnerabilities","description":"The updated packages fix security vulnerabilities:\n\nPackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers\nto cause a denial of service (double free), limit the ability of a malware\nscanner to operate on the entire original data, or possibly have\n unspecified other impact via a crafted file. (CVE-2018-11243)\n\nA heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in\nUPX 3.95 via a crafted Mach-O file. (CVE-2019-20021)\n\nA floating-point exception was discovered in PackLinuxElf::elf_hash in\np_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash,\nwhich leads to denial of service. (CVE-2019-20051)\n\nAn invalid memory address dereference was discovered in the canUnpack\nfunction in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.\n(CVE-2019-20053)\n\nA denial of service in PackLinuxElf32::PackLinuxElf32help1().\n(CVE-2019-1010048)\n","status":"published","published":"2020-02-24T21:44:46Z","modified":"2026-04-16T04:44:21.897306494Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2020:0162-1","title":"Security update for ucl","description":"This update for ucl fixes the following issues:\n\nCVE-2018-11243: Fix remotely triggerable DoS via double free (boo#1094138)\n\n","status":"published","published":"2020-02-04T09:13:42Z","modified":"2026-02-04T02:15:21.42749Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2020:0163-1","title":"Security update for upx","description":"This update for upx to version 3.96 fixes the following issues:\n\n\n- CVE-2019-1010048: Fixed a denial of service in PackLinuxElf32::PackLinuxElf32help1() (boo#1141777).\n- CVE-2019-14296: Fixed a denial of service in canUnpack() (boo#1143839).\n- CVE-2019-20021: Fixed a heap-based buffer over-read in canUnpack() (boo#1159833).\n- CVE-2019-20053: Fixed a denial of service in canUnpack() (boo#1159920).\n- CVE-2018-11243: Fixed a denial of service in PackLinuxElf64::unpack() (boo#1094138).\n\n- Update to version 3.96\n  * Bug fixes:\n    [CVE-2019-1010048, boo#1141777]\n    [CVE-2019-14296, boo#1143839]\n    [CVE-2019-20021, boo#1159833]\n    [CVE-2019-20053, boo#1159920]\n    [CVE-2018-11243 partially - ticket 206 ONLY, boo#1094138]\n- Update to version 3.95\n  * Flag --force-pie when ET_DYN main program is not marked as\n    DF_1_PIE\n  * Better compatibility with varying layout of address space on\n    Linux\n  * Support for 4 PT_LOAD layout in ELF generated by binutils-2.31\n  * bug fixes, particularly better diagnosis of malformed input\n  * bug fixes - see https://github.com/upx/upx/milestone/4\n","status":"published","published":"2020-02-04T09:13:50Z","modified":"2026-02-04T02:43:57.439317Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2020:0179-1","title":"Security update for ucl","description":"This update for ucl fixes the following issues:\n\nCVE-2018-11243: Fix remotely triggerable DoS via double free (boo#1094138)\n\n\nThis update was imported from the openSUSE:Leap:15.1:Update update project.","status":"published","published":"2020-02-06T14:42:15Z","modified":"2026-02-04T03:10:17.756269Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2020:0180-1","title":"Security update for upx","description":"This update for upx to version 3.96 fixes the following issues:\n\n\n- CVE-2019-1010048: Fixed a denial of service in PackLinuxElf32::PackLinuxElf32help1() (boo#1141777).\n- CVE-2019-14296: Fixed a denial of service in canUnpack() (boo#1143839).\n- CVE-2019-20021: Fixed a heap-based buffer over-read in canUnpack() (boo#1159833).\n- CVE-2019-20053: Fixed a denial of service in canUnpack() (boo#1159920).\n- CVE-2018-11243: Fixed a denial of service in PackLinuxElf64::unpack() (boo#1094138).\n\n- Update to version 3.96\n  * Bug fixes:\n    [CVE-2019-1010048, boo#1141777]\n    [CVE-2019-14296, boo#1143839]\n    [CVE-2019-20021, boo#1159833]\n    [CVE-2019-20053, boo#1159920]\n    [CVE-2018-11243 partially - ticket 206 ONLY, boo#1094138]\n- Update to version 3.95\n  * Flag --force-pie when ET_DYN main program is not marked as\n    DF_1_PIE\n  * Better compatibility with varying layout of address space on\n    Linux\n  * Support for 4 PT_LOAD layout in ELF generated by binutils-2.31\n  * bug fixes, particularly better diagnosis of malformed input\n  * bug fixes - see https://github.com/upx/upx/milestone/4\n\nThis update was imported from the openSUSE:Leap:15.1:Update update project.","status":"published","published":"2020-02-06T14:46:47Z","modified":"2026-02-04T02:16:44.587967Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2024:11477-1","title":"libucl1-1.03-4.9 on GA media","description":"These are all security issues fixed in the libucl1-1.03-4.9 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:40:23.045198Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"openSUSE-SU-2024:11486-1","title":"upx-3.96-3.2 on GA media","description":"These are all security issues fixed in the upx-3.96-3.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:12:56.599709Z","updated_at":"2026-11-02T16:58:35.195147Z"}]}}