{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21242 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21242 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21242 is a critical unsafe deserialization vulnerability in theonedev onedev, published on 15 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21242 and fix it if it is affected.\n\nWhat it is: CVE-2021-21242 is a critical unsafe deserialization vulnerability in theonedev onedev, published on 15 Jan 2021. 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-2021-21242 in the wild and no public exploit code.\n\nAffected product: theonedev onedev. 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-2021-21242/ (Markdown: https://insights.sbomify.com/CVE-2021-21242/index.md)","id":"CVE-2021-21242","markdown":"https://insights.sbomify.com/CVE-2021-21242/index.md","name":"CVE-2021-21242","record":{"aliases":["GHSA-5q3q-f373-2jv8"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"OneDev DevOps platform","requires_auth":"none","summary":"Unauthenticated attackers can achieve remote code execution by sending malicious serialized data to the attachment upload endpoint.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"onedev","vendor":"onedev_project"}],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"},{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"}],"description":"OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which can lead to pre-auth remote code execution. AttachmentUploadServlet deserializes untrusted data from the `Attachment-Support` header. This Servlet does not enforce any authentication or authorization checks. This issue may lead to pre-auth remote code execution. This issue was fixed in 4.0.3 by removing AttachmentUploadServlet and not using deserialization","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Pre-Auth Unsafe Deserialization on AttachmentUploadServet","id":"CVE-2021-21242","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Pre-Auth Unsafe Deserialization on KubernetesResource","id":"CVE-2021-21243"},"packages":[],"prev":{"headline":"CSRF can expose users authentication token in Flask-Security-Too","id":"CVE-2021-21241"},"products":["onedev"],"published":"2021-01-15","related":[{"cvss_score":10,"headline":"Pre-Auth Unsafe Deserialization on KubernetesResource","id":"CVE-2021-21243","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":10,"headline":"Pre-Auth SSTI via Bean validation message tampering","id":"CVE-2021-21244","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":10,"headline":"Pre-Auth Arbitrary File Upload","id":"CVE-2021-21245","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":9.9,"headline":"CI/CD Docker Escape in OneDev","id":"CVE-2022-39206","kev_date_added":null,"published":"2022-09-13"},{"cvss_score":9.6,"headline":"Post-Auth Unsafe Deserialization on BasePage (AJAX)","id":"CVE-2021-21247","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":9.6,"headline":"Post-Auth Arbitrary Code execution via Groovy script injection","id":"CVE-2021-21248","kev_date_added":null,"published":"2021-01-15"}],"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":"2024-08-03","vendors":["theonedev"]},"summary":"Unauthenticated attackers can achieve remote code execution by sending malicious serialized data to the attachment upload endpoint.","url":"https://insights.sbomify.com/CVE-2021-21242/"}