{"answers":{"affected":"It affects 5 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8617 exists.","fix":"Apply the vendor's patch.","what":"CVE-2020-8617 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 19 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-8617 and fix it if it is affected.\n\nWhat it is: CVE-2020-8617 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 19 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-8617 exists.\n\nAffected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-8617/ (Markdown: https://insights.sbomify.com/CVE-2020-8617/index.md)","id":"CVE-2020-8617","markdown":"https://insights.sbomify.com/CVE-2020-8617/index.md","name":"CVE-2020-8617","record":{"aliases":["ALPINE-CVE-2020-8617","DEBIAN-CVE-2020-8617","GHSA-q6g5-8p95-hqh7","RHSA-2020:2893","UBUNTU-CVE-2020-8617"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"BIND DNS server","requires_auth":"none","summary":"An attacker can cause a BIND DNS server to crash by sending a specially crafted message that triggers an assertion failure in TSIG validation.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"isc","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"bind","vendor":"isc"},{"product":"leap","vendor":"opensuse"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-617","name":"Reachable Assertion"}],"description":"Using a specially-crafted message, an attacker may potentially cause a BIND server to reach an inconsistent state if the attacker knows (or successfully guesses) the name of a TSIG key used by the server. Since BIND, by default, configures a local session key even on servers whose configuration does not otherwise make use of it, almost all current BIND servers are vulnerable. In releases of BIND dating from March 2018 and after, an assertion check in tsig.c detects this inconsistent state and deliberately exits. Prior to the introduction of the check the server would continue operating in an inconsistent state, with potentially harmful results.","ecosystems":["Red Hat:rhel_eus:7.7::computenode","Red Hat:rhel_eus:7.7::server"],"exploits":{"exploitdb":1,"first_seen":"2020-05-19","github_poc":2,"max_poc_stars":45,"metasploit":1,"nuclei":0,"refs":[{"date":"2020-05-20T12:26:45Z","kind":"github_poc","ref":"https://github.com/knqyf263/CVE-2020-8617","stars":45,"title":"PoC for CVE-2020-8617 (BIND)"},{"date":"2020-05-19","kind":"metasploit","ref":"auxiliary/dos/dns/bind_tsig_badtime","stars":null,"title":"BIND TSIG Badtime Query Denial of Service"},{"date":"2020-05-20","kind":"exploitdb","ref":"48521","stars":null,"title":"BIND - 'TSIG' Denial of Service"},{"date":"2020-05-26T14:23:40Z","kind":"github_poc","ref":"https://github.com/gothburz/cve-2020-8617","stars":0,"title":null}],"tier":"weaponised"},"has_fix":true,"headline":"A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c","id":"CVE-2020-8617","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","isc:bind","opensuse:leap"],"type":"denial_of_service","year":"2020"},"n_packages":34,"n_references":12,"next":{"headline":"A buffer boundary check assertion in rdataset.c can fail incorrectly during zone transfer","id":"CVE-2020-8618"},"packages":[{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind","purl":"pkg:rpm/redhat/bind","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-chroot","purl":"pkg:rpm/redhat/bind-chroot","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-debuginfo","purl":"pkg:rpm/redhat/bind-debuginfo","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-devel","purl":"pkg:rpm/redhat/bind-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-export-devel","purl":"pkg:rpm/redhat/bind-export-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-export-libs","purl":"pkg:rpm/redhat/bind-export-libs","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-libs","purl":"pkg:rpm/redhat/bind-libs","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-libs-lite","purl":"pkg:rpm/redhat/bind-libs-lite","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-license","purl":"pkg:rpm/redhat/bind-license","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-lite-devel","purl":"pkg:rpm/redhat/bind-lite-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11","purl":"pkg:rpm/redhat/bind-pkcs11","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-devel","purl":"pkg:rpm/redhat/bind-pkcs11-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-libs","purl":"pkg:rpm/redhat/bind-pkcs11-libs","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-utils","purl":"pkg:rpm/redhat/bind-pkcs11-utils","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-sdb","purl":"pkg:rpm/redhat/bind-sdb","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-sdb-chroot","purl":"pkg:rpm/redhat/bind-sdb-chroot","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-utils","purl":"pkg:rpm/redhat/bind-utils","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind","purl":"pkg:rpm/redhat/bind","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-chroot","purl":"pkg:rpm/redhat/bind-chroot","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-debuginfo","purl":"pkg:rpm/redhat/bind-debuginfo","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-devel","purl":"pkg:rpm/redhat/bind-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-export-devel","purl":"pkg:rpm/redhat/bind-export-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-export-libs","purl":"pkg:rpm/redhat/bind-export-libs","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-libs","purl":"pkg:rpm/redhat/bind-libs","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-libs-lite","purl":"pkg:rpm/redhat/bind-libs-lite","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-license","purl":"pkg:rpm/redhat/bind-license","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-lite-devel","purl":"pkg:rpm/redhat/bind-lite-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11","purl":"pkg:rpm/redhat/bind-pkcs11","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-devel","purl":"pkg:rpm/redhat/bind-pkcs11-devel","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-libs","purl":"pkg:rpm/redhat/bind-pkcs11-libs","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-utils","purl":"pkg:rpm/redhat/bind-pkcs11-utils","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-sdb","purl":"pkg:rpm/redhat/bind-sdb","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-sdb-chroot","purl":"pkg:rpm/redhat/bind-sdb-chroot","source":"RHSA-2020:2893"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["32:9.11.4-9.P2.el7_7.1"],"introduced":["0"],"last_affected":[],"package":"bind-utils","purl":"pkg:rpm/redhat/bind-utils","source":"RHSA-2020:2893"}],"prev":{"headline":"BIND does not sufficiently limit the number of fetches performed when processing referrals","id":"CVE-2020-8616"},"products":["BIND9"],"published":"2020-05-19","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-16","vendors":["ISC"]},"summary":"An attacker can cause a BIND DNS server to crash by sending a specially crafted message that triggers an assertion failure in TSIG validation.","url":"https://insights.sbomify.com/CVE-2020-8617/"}