{"answers":{"affected":"It affects 9 products.","exploited":"There is no known exploitation of CVE-2020-5523 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-5523 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-5523 is a high-severity vulnerability in NTT Data Corporation 'MyPallete' and some of the Android banking applications that use 'MyPallete', published on 28 Jan 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-2020-5523 and fix it if it is affected.\n\nWhat it is: CVE-2020-5523 is a high-severity vulnerability in NTT Data Corporation 'MyPallete' and some of the Android banking applications that use 'MyPallete', published on 28 Jan 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-2020-5523 in the wild and no public exploit code.\n\nAffected product: NTT Data Corporation 'MyPallete' and some of the Android banking applications that use 'MyPallete'. 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-2020-5523/ (Markdown: https://insights.sbomify.com/CVE-2020-5523/index.md)","id":"CVE-2020-5523","markdown":"https://insights.sbomify.com/CVE-2020-5523/index.md","name":"CVE-2020-5523","record":{"aliases":["GHSA-qrwh-wc9j-x9cj"],"analysis":{"component_type":"mobile_application","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Android banking app","requires_auth":"none","summary":"Man-in-the-middle attackers can spoof servers and steal sensitive data from Android banking apps using MyPallete due to improper X.509 certificate validation.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"77_bank","vendor":"77bank"},{"product":"ashigin","vendor":"ashikagabank"},{"product":"dogin","vendor":"hokkaidobank"},{"product":"hokuriku_bank_portal","vendor":"hokugin"},{"product":"nagagin","vendor":"naganobank"},{"product":"mypallete","vendor":"nttdata"},{"product":"shikoku_bank","vendor":"shikokubank"},{"product":"ikeda_senshu_bank","vendor":"sihd-bk"},{"product":"tougin","vendor":"tohoku-bank"}],"cvss":{"score":7.4,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not verify X.509 certificates from servers, and also do not properly validate certificates with host-mismatch, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Weak cryptography in 'MyPallete' and some of the Android banking applications that use 'MyPallete'","id":"CVE-2020-5523","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2020"},"n_packages":0,"n_references":10,"next":{"headline":"Command injection in Aterm series","id":"CVE-2020-5524"},"packages":[],"prev":{"headline":"Weak cryptography in kantan netprint App for Android","id":"CVE-2020-5522"},"products":["'MyPallete' and some of the Android banking applications that use 'MyPallete'"],"published":"2020-01-28","related":[],"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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["NTT Data Corporation"]},"summary":"Man-in-the-middle attackers can spoof servers and steal sensitive data from Android banking apps using MyPallete due to improper X.509 certificate validation.","url":"https://insights.sbomify.com/CVE-2020-5523/"}