{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2016-0772 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2016-0772 is a medium-severity vulnerability in Python Python, published on 2 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-0772 and fix it if it is affected.\n\nWhat it is: CVE-2016-0772 is a medium-severity vulnerability in Python Python, published on 2 Sep 2016. 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-2016-0772 in the wild and no public exploit code.\n\nAffected product: Python Python. 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-2016-0772/ (Markdown: https://insights.sbomify.com/CVE-2016-0772/index.md)","id":"CVE-2016-0772","markdown":"https://insights.sbomify.com/CVE-2016-0772/index.md","name":"CVE-2016-0772","record":{"aliases":["AZL-109605","DEBIAN-CVE-2016-0772","DLA-871-1","GHSA-6m57-q338-h677","PSF-2016-3","UBUNTU-CVE-2016-0772"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Python smtplib library","requires_auth":"none","summary":"Man-in-the-middle attackers can bypass TLS encryption in Python's smtplib by blocking StartTLS commands, exposing email traffic to interception.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"python","vendor":"python"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","version":"3.0"},"cwes":[{"id":"CWE-693","name":"Protection Mechanism Failure"}],"description":"The smtplib library in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \"StartTLS stripping attack.\"","ecosystems":[],"exploits":{"exploitdb":1,"first_seen":"2016-07-03","github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[{"date":"2016-07-03","kind":"exploitdb","ref":"43500","stars":null,"title":"Python smtplib 2.7.11 / 3.4.4 / 3.5.1 - Man In The Middle StartTLS Stripping"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Security feature bypass in n/a","id":"CVE-2016-0772","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"python:python","products":["python:python"],"type":"security_feature_bypass","year":"2016"},"n_packages":0,"n_references":18,"next":{"headline":"Denial of service in n/a","id":"CVE-2016-0773"},"packages":[],"prev":{"headline":"Information disclosure in n/a","id":"CVE-2016-0771"},"products":["n/a"],"published":"2016-09-02","related":[{"cvss_score":10,"headline":"Integer overflow in n/a","id":"CVE-2008-5031","kev_date_added":null,"published":"2008-11-10"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2014-4650","kev_date_added":null,"published":"2020-02-20"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2016-5636","kev_date_added":null,"published":"2016-09-02"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2007-4559","kev_date_added":null,"published":"2007-08-28"},{"cvss_score":8.8,"headline":"Command injection in n/a","id":"CVE-2017-17522","kev_date_added":null,"published":"2017-12-14"},{"cvss_score":8.7,"headline":"Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations","id":"CVE-2026-15308","kev_date_added":null,"published":"2026-07-09"},{"cvss_score":7.8,"headline":"Privilege escalation in n/a","id":"CVE-2019-13404","kev_date_added":null,"published":"2019-07-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-05","vendors":["n/a"]},"summary":"Man-in-the-middle attackers can bypass TLS encryption in Python's smtplib by blocking StartTLS commands, exposing email traffic to interception.","url":"https://insights.sbomify.com/CVE-2016-0772/"}