{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-29453 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-29453 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-29453 is a medium-severity denial of service vulnerability in turt2live matrix-media-repo, published on 19 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-29453 and fix it if it is affected.\n\nWhat it is: CVE-2021-29453 is a medium-severity denial of service vulnerability in turt2live matrix-media-repo, published on 19 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-29453 in the wild and no public exploit code.\n\nAffected product: turt2live matrix-media-repo. 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-2021-29453/ (Markdown: https://insights.sbomify.com/CVE-2021-29453/index.md)","id":"CVE-2021-29453","markdown":"https://insights.sbomify.com/CVE-2021-29453/index.md","name":"CVE-2021-29453","record":{"aliases":["GHSA-j889-h476-hh9h"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Matrix media repository","requires_auth":"low_privilege","summary":"A malicious user can cause denial of service by uploading crafted images that exhaust server memory during thumbnailing in matrix-media-repo.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"matrix-media-repo","vendor":"matrix-media-repo_project"}],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"matrix-media-repo is an open-source multi-domain media repository for Matrix. Versions 1.2.6 and earlier of matrix-media-repo do not properly handle malicious images which are crafted to be small in file size, but large in complexity. A malicious user could upload a relatively small image in terms of file size, using particular image formats, which expands to have extremely large dimensions during the process of thumbnailing. The server can be exhausted of memory in the process of trying to load the whole image into memory for thumbnailing, leading to denial of service. Version 1.2.7 has a fix for the vulnerability.","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":"Denial of service through memory exhaustion","id":"CVE-2021-29453","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Sandbox Escape by math function in smarty","id":"CVE-2021-29454"},"packages":[],"prev":{"headline":"Any logged in user could edit any other logged in user.","id":"CVE-2021-29452"},"products":["matrix-media-repo"],"published":"2021-04-19","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":"2024-08-03","vendors":["turt2live"]},"summary":"A malicious user can cause denial of service by uploading crafted images that exhaust server memory during thumbnailing in matrix-media-repo.","url":"https://insights.sbomify.com/CVE-2021-29453/"}