{"answers":{"affected":"2 open source packages ship an affected version, including org.opencastproject:opencast-kernel. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-32623 in the wild and no public exploit code.","fix":"Upgrade org.opencastproject:opencast-kernel to 9.6 or later.","what":"CVE-2021-32623 is a high-severity denial of service vulnerability in opencast, published on 15 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-32623 and fix it if it is affected.\n\nWhat it is: CVE-2021-32623 is a high-severity denial of service vulnerability in opencast, published on 15 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-32623 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.opencastproject:opencast-kernel (Maven): affected all versions; fixed in 9.6\n- org.opencastproject:opencast-kernel (Maven): affected all versions; fixed in 9.6\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-2021-32623/ (Markdown: https://insights.sbomify.com/CVE-2021-32623/index.md)","id":"CVE-2021-32623","markdown":"https://insights.sbomify.com/CVE-2021-32623/index.md","name":"CVE-2021-32623","record":{"aliases":["GHSA-9gwx-9cwp-5c2m"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Video capture platform","requires_auth":"low_privilege","summary":"An attacker with ingest privileges can cause a permanent denial of service in Opencast via an XML bomb attack.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"opencast","vendor":"apereo"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-776","name":"Improper Restriction of Recursive Entity References in DTDs"}],"description":"Opencast is a free and open source solution for automated video capture and distribution. Versions of Opencast prior to 9.6 are vulnerable to the billion laughs attack, which allows an attacker to easily execute a (seemingly permanent) denial of service attack, essentially taking down Opencast using a single HTTP request. To exploit this, users need to have ingest privileges, limiting the group of potential attackers The problem has been fixed in Opencast 9.6. There is no known workaround for this issue.","ecosystems":["Maven"],"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":"Opencast vulnerable to billion laughs attack (XML bomb)","id":"CVE-2021-32623","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Private Field data leak","id":"CVE-2021-32624"},"packages":[{"ecosystem":"Maven","fixed":["9.6"],"introduced":["0"],"last_affected":[],"package":"org.opencastproject:opencast-kernel","purl":null,"source":"GHSA-9gwx-9cwp-5c2m"},{"ecosystem":"Maven","fixed":["9.6"],"introduced":["0"],"last_affected":[],"package":"org.opencastproject:opencast-kernel","purl":"pkg:maven/org.opencastproject/opencast-kernel","source":"GHSA-9gwx-9cwp-5c2m"}],"prev":{"headline":"File upload local preview can run embedded scripts after user interaction","id":"CVE-2021-32622"},"products":["opencast"],"published":"2021-06-15","related":[{"cvss_score":9.9,"headline":"Files Accessible to External Parties in Opencast","id":"CVE-2021-43821","kev_date_added":null,"published":"2021-12-14"},{"cvss_score":8.7,"headline":"Authentication Bypass For Endpoints With Anonymous Access in OpenCast","id":"CVE-2020-5206","kev_date_added":null,"published":"2020-01-30"},{"cvss_score":7.7,"headline":"Opencast stores passwords using outdated MD5 hash algorithm","id":"CVE-2020-5229","kev_date_added":null,"published":"2020-01-30"},{"cvss_score":7.7,"headline":"Opencast uses unsafe identifiers","id":"CVE-2020-5230","kev_date_added":null,"published":"2020-01-30"},{"cvss_score":7.6,"headline":"Opencast allows unauthorized public access via OAI-PMH","id":"CVE-2020-5228","kev_date_added":null,"published":"2020-01-30"},{"cvss_score":7.5,"headline":"Opencast publishes global system account credentials","id":"CVE-2018-16153","kev_date_added":null,"published":"2023-12-12"}],"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":"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":["opencast"]},"summary":"An attacker with ingest privileges can cause a permanent denial of service in Opencast via an XML bomb attack.","url":"https://insights.sbomify.com/CVE-2021-32623/"}