{"answers":{"affected":"6 open source packages ship an affected version, including org.bouncycastle:bcprov-jdk14, org.bouncycastle:bcprov-jdk15 and org.bouncycastle:bcprov-jdk15on. It affects 1 product.","exploited":"There is no known exploitation of CVE-2016-1000340 in the wild and no public exploit code.","fix":"Upgrade org.bouncycastle:bcprov-jdk14 to 1.56 or later.","what":"CVE-2016-1000340 is a high-severity vulnerability in Bouncycastle Bc-Java, published on 4 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-1000340 and fix it if it is affected.\n\nWhat it is: CVE-2016-1000340 is a high-severity vulnerability in Bouncycastle Bc-Java, published on 4 Jun 2018. 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-2016-1000340 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.bouncycastle:bcprov-jdk14 (Maven): affected from 1.51; fixed in 1.56\n- org.bouncycastle:bcprov-jdk14 (Maven): affected from 1.51; fixed in 1.56\n- org.bouncycastle:bcprov-jdk15 (Maven): affected from 1.51; fixed in 1.56\n- org.bouncycastle:bcprov-jdk15 (Maven): affected from 1.51; fixed in 1.56\n- org.bouncycastle:bcprov-jdk15on (Maven): affected from 1.51; fixed in 1.56\n- org.bouncycastle:bcprov-jdk15on (Maven): affected from 1.51; fixed in 1.56\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-2016-1000340/ (Markdown: https://insights.sbomify.com/CVE-2016-1000340/index.md)","id":"CVE-2016-1000340","markdown":"https://insights.sbomify.com/CVE-2016-1000340/index.md","name":"CVE-2016-1000340","record":{"aliases":["DEBIAN-CVE-2016-1000340","GHSA-r97x-3g8f-gx3m","UBUNTU-CVE-2016-1000340"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"Java cryptography library","requires_auth":"none","summary":"A carry propagation bug in Bouncy Castle's elliptic curve math could cause rare spurious calculation errors, though output validation mitigated most risks.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"bc-java","vendor":"bouncycastle"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.0"},"cwes":[{"id":"CWE-19","name":null}],"description":"In the Bouncy Castle JCE Provider versions 1.51 to 1.55, a carry propagation bug was introduced in the implementation of squaring for several raw math classes have been fixed (org.bouncycastle.math.raw.Nat???). These classes are used by our custom elliptic curve implementations (org.bouncycastle.math.ec.custom.**), so there was the possibility of rare (in general usage) spurious calculations for elliptic curve scalar multiplications. Such errors would have been detected with high probability by the output validation for our scalar multipliers.","ecosystems":["Maven"],"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":"The Bouncy Castle JCE Provider carry a propagation bug","id":"CVE-2016-1000340","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"bouncycastle:bc-java","products":["bouncycastle:bc-java"],"type":"other","year":"2016"},"n_packages":6,"n_references":5,"next":{"headline":"Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15","id":"CVE-2016-1000341"},"packages":[{"ecosystem":"Maven","fixed":["1.56"],"introduced":["1.51"],"last_affected":[],"package":"org.bouncycastle:bcprov-jdk14","purl":null,"source":"GHSA-r97x-3g8f-gx3m"},{"ecosystem":"Maven","fixed":["1.56"],"introduced":["1.51"],"last_affected":[],"package":"org.bouncycastle:bcprov-jdk14","purl":"pkg:maven/org.bouncycastle/bcprov-jdk14","source":"GHSA-r97x-3g8f-gx3m"},{"ecosystem":"Maven","fixed":["1.56"],"introduced":["1.51"],"last_affected":[],"package":"org.bouncycastle:bcprov-jdk15","purl":null,"source":"GHSA-r97x-3g8f-gx3m"},{"ecosystem":"Maven","fixed":["1.56"],"introduced":["1.51"],"last_affected":[],"package":"org.bouncycastle:bcprov-jdk15","purl":"pkg:maven/org.bouncycastle/bcprov-jdk15","source":"GHSA-r97x-3g8f-gx3m"},{"ecosystem":"Maven","fixed":["1.56"],"introduced":["1.51"],"last_affected":[],"package":"org.bouncycastle:bcprov-jdk15on","purl":null,"source":"GHSA-r97x-3g8f-gx3m"},{"ecosystem":"Maven","fixed":["1.56"],"introduced":["1.51"],"last_affected":[],"package":"org.bouncycastle:bcprov-jdk15on","purl":"pkg:maven/org.bouncycastle/bcprov-jdk15on","source":"GHSA-r97x-3g8f-gx3m"}],"prev":{"headline":"Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15","id":"CVE-2016-1000339"},"products":["n/a"],"published":"2018-06-04","related":[{"cvss_score":10,"headline":"Legion of the Bouncy Castle Java Cryptography API Bleichenbacher Oracle Vulnerability","id":"CVE-2007-6721","kev_date_added":null,"published":"2009-03-30"},{"cvss_score":9.8,"headline":"Deserialization of Untrusted Data in Bouncy castle","id":"CVE-2018-1000613","kev_date_added":null,"published":"2018-07-09"},{"cvss_score":9.3,"headline":"Stapled OCSP response accepted without binding to the checked certificate","id":"CVE-2026-58062","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":9.3,"headline":"JSSE hostname verifier CN-fallback enabled by default despite documented opt-in","id":"CVE-2026-59638","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":9.3,"headline":"MTI/A0 DH agreement exponentiates unvalidated peer value","id":"CVE-2026-59650","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":9.3,"headline":"Name Constraints bypass via trailing dot in rfc822Name and URI","id":"CVE-2026-8763","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":8.7,"headline":"MLS membership checks compare a uint32 leaf_index as signed, admitting an out-of-range sender","id":"CVE-2026-17507","kev_date_added":null,"published":"2026-10-02"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"2024-08-06","vendors":["n/a"]},"summary":"A carry propagation bug in Bouncy Castle's elliptic curve math could cause rare spurious calculation errors, though output validation mitigated most risks.","url":"https://insights.sbomify.com/CVE-2016-1000340/"}