{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-1763 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2020-1763 is a high-severity denial of service vulnerability in the libreswan Project libreswan, published on 12 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-2020-1763 and fix it if it is affected.\n\nWhat it is: CVE-2020-1763 is a high-severity denial of service vulnerability in the libreswan Project libreswan, published on 12 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-1763 in the wild and no public exploit code.\n\nAffected product: the libreswan Project libreswan. 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-2020-1763/ (Markdown: https://insights.sbomify.com/CVE-2020-1763/index.md)","id":"CVE-2020-1763","markdown":"https://insights.sbomify.com/CVE-2020-1763/index.md","name":"CVE-2020-1763","record":{"aliases":["DEBIAN-CVE-2020-1763","DSA-4684-1","GHSA-wx69-vm3h-3cgv","MGASA-2020-0215","RHSA-2020:2069","RHSA-2020:2070","RHSA-2020:2071","UBUNTU-CVE-2020-1763"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"IPsec VPN daemon","requires_auth":"none","summary":"An unauthenticated attacker can crash the libreswan pluto daemon by sending specially crafted IKEv1 packets, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"libreswan","vendor":"libreswan"}],"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-125","name":"Out-of-bounds Read"}],"description":"An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flaw to crash libreswan by sending specially-crafted IKEv1 Informational Exchange packets. The daemon respawns after the crash.","ecosystems":["Red Hat:enterprise_linux:8::appstream","Red Hat:rhel_e4s:8.0::appstream","Red Hat:rhel_eus:8.1::appstream"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Denial of service in libreswan","id":"CVE-2020-1763","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":9,"n_references":8,"next":{"headline":"Hard coded cryptographic key in Kiali","id":"CVE-2020-1764"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.29-7.el8_2"],"introduced":["0"],"last_affected":[],"package":"libreswan","purl":"pkg:rpm/redhat/libreswan","source":"RHSA-2020:2070"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.29-7.el8_2"],"introduced":["0"],"last_affected":[],"package":"libreswan-debuginfo","purl":"pkg:rpm/redhat/libreswan-debuginfo","source":"RHSA-2020:2070"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.29-7.el8_2"],"introduced":["0"],"last_affected":[],"package":"libreswan-debugsource","purl":"pkg:rpm/redhat/libreswan-debugsource","source":"RHSA-2020:2070"},{"ecosystem":"Red Hat:rhel_e4s:8.0::appstream","fixed":["0:3.27-10.el8_0"],"introduced":["0"],"last_affected":[],"package":"libreswan","purl":"pkg:rpm/redhat/libreswan","source":"RHSA-2020:2069"},{"ecosystem":"Red Hat:rhel_e4s:8.0::appstream","fixed":["0:3.27-10.el8_0"],"introduced":["0"],"last_affected":[],"package":"libreswan-debuginfo","purl":"pkg:rpm/redhat/libreswan-debuginfo","source":"RHSA-2020:2069"},{"ecosystem":"Red Hat:rhel_e4s:8.0::appstream","fixed":["0:3.27-10.el8_0"],"introduced":["0"],"last_affected":[],"package":"libreswan-debugsource","purl":"pkg:rpm/redhat/libreswan-debugsource","source":"RHSA-2020:2069"},{"ecosystem":"Red Hat:rhel_eus:8.1::appstream","fixed":["0:3.29-7.el8_1"],"introduced":["0"],"last_affected":[],"package":"libreswan","purl":"pkg:rpm/redhat/libreswan","source":"RHSA-2020:2071"},{"ecosystem":"Red Hat:rhel_eus:8.1::appstream","fixed":["0:3.29-7.el8_1"],"introduced":["0"],"last_affected":[],"package":"libreswan-debuginfo","purl":"pkg:rpm/redhat/libreswan-debuginfo","source":"RHSA-2020:2071"},{"ecosystem":"Red Hat:rhel_eus:8.1::appstream","fixed":["0:3.29-7.el8_1"],"introduced":["0"],"last_affected":[],"package":"libreswan-debugsource","purl":"pkg:rpm/redhat/libreswan-debugsource","source":"RHSA-2020:2071"}],"prev":{"headline":"Insufficient Session Expiration in Kiali","id":"CVE-2020-1762"},"products":["libreswan"],"published":"2020-05-12","related":[{"cvss_score":9.3,"headline":"Race condition in n/a","id":"CVE-2013-7283","kev_date_added":null,"published":"2014-01-09"},{"cvss_score":7.5,"headline":"IKEv2 Denial of Service via malformed fragmentation","id":"CVE-2026-12413","kev_date_added":null,"published":"2026-07-02"},{"cvss_score":7.5,"headline":"IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload","id":"CVE-2026-50721","kev_date_added":null,"published":"2026-07-02"},{"cvss_score":7.5,"headline":"IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload","id":"CVE-2026-50722","kev_date_added":null,"published":"2026-07-02"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2023-30570","kev_date_added":null,"published":"2023-05-28"},{"cvss_score":7.5,"headline":"Denial of service in libreswan","id":"CVE-2023-2295","kev_date_added":null,"published":"2023-05-17"}],"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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["the libreswan Project"]},"summary":"An unauthenticated attacker can crash the libreswan pluto daemon by sending specially crafted IKEv1 packets, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2020-1763/"}