{"api_version":"1","generated_at":"2026-04-23T02:57:08+00:00","cve":"CVE-2020-1983","urls":{"html":"https://cve.report/CVE-2020-1983","api":"https://cve.report/api/cve/CVE-2020-1983.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-1983","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-1983"},"summary":{"title":"CVE-2020-1983","description":"A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.","state":"PUBLIC","assigner":"psirt@paloaltonetworks.com","published_at":"2020-04-22 20:15:00","updated_at":"2023-11-07 03:19:00"},"problem_types":["CWE-416"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/","name":"FEDORA-2020-1608d52724","refsource":"","tags":[],"title":"[SECURITY] Fedora 31 Update: libslirp-4.1.0-2.fc31 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html","name":"openSUSE-SU-2020:0636","refsource":"SUSE","tags":["Third Party Advisory"],"title":"[security-announce] openSUSE-SU-2020:0636-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html","name":"openSUSE-SU-2020:0756","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:0756-1: moderate: Security update f","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html","name":"[debian-lts-announce] 20200629 [SECURITY] [DLA 2262-1] qemu security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2262-1] qemu security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04","name":"https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"Merge branch 'cve-2020-1983' into 'master' (9ac0371b) · Commits · slirp / libslirp · GitLab","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/","name":"FEDORA-2020-30c45be10c","refsource":"FEDORA","tags":["Third Party Advisory"],"title":"[SECURITY] Fedora 32 Update: libslirp-4.2.0-2.fc32 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html","name":"[debian-lts-announce] 20200726 [SECURITY] [DLA 2288-1] qemu security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2288-1] qemu security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/4372-1/","name":"USN-4372-1","refsource":"UBUNTU","tags":[],"title":"USN-4372-1: QEMU vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20","name":"https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"Security Disclosure (#20) · Issues · slirp / libslirp · GitLab","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/","name":"FEDORA-2020-30c45be10c","refsource":"","tags":[],"title":"[SECURITY] Fedora 32 Update: libslirp-4.2.0-2.fc32 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/","name":"FEDORA-2020-1608d52724","refsource":"FEDORA","tags":["Third Party Advisory"],"title":"[SECURITY] Fedora 31 Update: libslirp-4.1.0-2.fc31 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.debian.org/security/2020/dsa-4665","name":"DSA-4665","refsource":"DEBIAN","tags":["Third Party Advisory"],"title":"Debian -- Security Information -- DSA-4665-1 qemu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-1983","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1983","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"LEGACY","value":"This issue was discovered by Aviv Sasson of Palo Alto Networks.","lang":""}],"nvd_cpes":[{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"16.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"esm","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"18.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"19.10","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"20.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"31","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"32","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"31","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"32","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"4.2.0","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"libslirp_project","cpe5":"libslirp","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"1983","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-1983","qid":"159669","title":"Oracle Enterprise Linux Security Update for virt:ol and virt-devel:rhel (ELSA-2020-4676)"},{"cve":"CVE-2020-1983","qid":"239166","title":"Red Hat Update for qemu-kvm-rhev (RHSA-2021:0934)"},{"cve":"CVE-2020-1983","qid":"377063","title":"Alibaba Cloud Linux Security Update for qemu-kvm (ALINUX2-SA-2020:0120)"},{"cve":"CVE-2020-1983","qid":"377247","title":"Alibaba Cloud Linux Security Update for qemu-kvm-ma (ALINUX2-SA-2021:0007)"},{"cve":"CVE-2020-1983","qid":"377335","title":"Alibaba Cloud Linux Security Update for container-tools:rhel8 (ALINUX3-SA-2022:0110)"},{"cve":"CVE-2020-1983","qid":"377413","title":"Alibaba Cloud Linux Security Update for virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0119)"},{"cve":"CVE-2020-1983","qid":"501608","title":"Alpine Linux Security Update for libslirp"},{"cve":"CVE-2020-1983","qid":"940165","title":"AlmaLinux Security Update for virt:rhel and virt-devel:rhel (ALSA-2020:4676)"},{"cve":"CVE-2020-1983","qid":"940565","title":"AlmaLinux Security Update for container-tools:rhel8 (ALSA-2020:3053)"},{"cve":"CVE-2020-1983","qid":"960273","title":"Rocky Linux Security Update for virt:rhel and virt-devel:rhel (RLSA-2020:4676)"},{"cve":"CVE-2020-1983","qid":"960335","title":"Rocky Linux Security Update for container-tools:rhel8 (RLSA-2020:3053)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"psirt@paloaltonetworks.com","DATE_PUBLIC":"2020-04-20T20:28:00.000Z","ID":"CVE-2020-1983","STATE":"PUBLIC","TITLE":"libslirp: use after free vulnerability cause a denial of service."},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"libslirp","version":{"version_data":[{"version_affected":"<=","version_value":"4.2.0"}]}}]},"vendor_name":"slirp"}]}},"credit":[{"lang":"eng","value":"This issue was discovered by Aviv Sasson of Palo Alto Networks."}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service."}]},"exploit":[{"lang":"eng","value":"A public proof of concept is available."}],"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-416 Use After Free"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20","name":"https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20"},{"refsource":"MISC","url":"https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04","name":"https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04"},{"refsource":"DEBIAN","name":"DSA-4665","url":"https://www.debian.org/security/2020/dsa-4665"},{"refsource":"FEDORA","name":"FEDORA-2020-30c45be10c","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/"},{"refsource":"FEDORA","name":"FEDORA-2020-1608d52724","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/"},{"refsource":"SUSE","name":"openSUSE-SU-2020:0636","url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html"},{"refsource":"UBUNTU","name":"USN-4372-1","url":"https://usn.ubuntu.com/4372-1/"},{"refsource":"SUSE","name":"openSUSE-SU-2020:0756","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20200629 [SECURITY] [DLA 2262-1] qemu security update","url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20200726 [SECURITY] [DLA 2288-1] qemu security update","url":"https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html"}]},"source":{"defect":["20"],"discovery":"EXTERNAL"}},"nvd":{"publishedDate":"2020-04-22 20:15:00","lastModifiedDate":"2023-11-07 03:19:00","problem_types":["CWE-416"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":2,"impactScore":4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:N/A:P","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":2.1},"severity":"LOW","exploitabilityScore":3.9,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:libslirp_project:libslirp:*:*:*:*:*:*:*:*","versionEndIncluding":"4.2.0","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"1983","Ordinal":"161453","Title":"CVE-2020-1983","CVE":"CVE-2020-1983","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"1983","Ordinal":"1","NoteData":"A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"1983","Ordinal":"2","NoteData":"2020-04-22","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"1983","Ordinal":"3","NoteData":"2020-07-26","Type":"Other","Title":"Modified"}]}}}