{"answers":{"affected":"3 open source packages ship an affected version, including cryptography. It affects 3 products.","exploited":"There is no known exploitation of CVE-2016-9243 in the wild and no public exploit code.","fix":"Upgrade cryptography to 1.5.3 or later.","what":"CVE-2016-9243 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-9243 and fix it if it is affected.\n\nWhat it is: CVE-2016-9243 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2017. 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-2016-9243 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- cryptography (PyPI): affected all versions; fixed in 1.5.3\n- cryptography (PyPI): affected all versions; fixed in 1.5.3\n- cryptography (PyPI): affected all versions; fixed in 1.5.3\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-2016-9243/ (Markdown: https://insights.sbomify.com/CVE-2016-9243/index.md)","id":"CVE-2016-9243","markdown":"https://insights.sbomify.com/CVE-2016-9243/index.md","name":"CVE-2016-9243","record":{"aliases":["DEBIAN-CVE-2016-9243","GHSA-q3cj-2r34-2cwc","MGASA-2016-0377","PYSEC-2017-8","UBUNTU-CVE-2016-9243","USN-3138-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"Python cryptography library","requires_auth":"none","summary":"The HKDF function in the cryptography library returns an empty byte string when the requested length is smaller than the digest size, potentially causing unexpected behavior in dependent applications.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"cryptography","vendor":"cryptography.io"},{"product":"fedora","vendor":"fedoraproject"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[],"description":"HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.","ecosystems":["PyPI"],"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":"Improper input validation in cryptography","id":"CVE-2016-9243","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","fedoraproject:fedora"],"type":"other","year":"2016"},"n_packages":3,"n_references":9,"next":{"headline":"Information disclosure in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, GTM, Link Controller, PEM, PSM","id":"CVE-2016-9244"},"packages":[{"ecosystem":"PyPI","fixed":["1.5.3"],"introduced":["0"],"last_affected":[],"package":"cryptography","purl":null,"source":"GHSA-q3cj-2r34-2cwc"},{"ecosystem":"PyPI","fixed":["1.5.3"],"introduced":["0"],"last_affected":[],"package":"cryptography","purl":"pkg:pypi/cryptography","source":"GHSA-q3cj-2r34-2cwc"},{"ecosystem":"PyPI","fixed":["1.5.3"],"introduced":["0"],"last_affected":[],"package":"cryptography","purl":"pkg:pypi/cryptography","source":"PYSEC-2017-8"}],"prev":{"headline":"SQL injection in n/a","id":"CVE-2016-9242"},"products":["n/a"],"published":"2017-03-27","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":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"The HKDF function in the cryptography library returns an empty byte string when the requested length is smaller than the digest size, potentially causing unexpected behavior in dependent applications.","url":"https://insights.sbomify.com/CVE-2016-9243/"}