{"answers":{"affected":"3 open source packages ship an affected version, including matrix-synapse. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-32323 exists.","fix":"Upgrade matrix-synapse to 1.74.0 or later.","what":"CVE-2023-32323 is a medium-severity denial of service vulnerability in matrix-org synapse, published on 26 May 2023. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-32323 and fix it if it is affected.\n\nWhat it is: CVE-2023-32323 is a medium-severity denial of service vulnerability in matrix-org synapse, published on 26 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-32323 exists.\n\nAffected packages and fixed versions:\n- matrix-synapse (PyPI): affected all versions; fixed in 1.74.0\n- matrix-synapse (PyPI): affected all versions; fixed in 1.74.0\n- matrix-synapse (PyPI): affected all versions; fixed in 1.74.0\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-2023-32323/ (Markdown: https://insights.sbomify.com/CVE-2023-32323/index.md)","id":"CVE-2023-32323","markdown":"https://insights.sbomify.com/CVE-2023-32323/index.md","name":"CVE-2023-32323","record":{"aliases":["GHSA-f3wc-3vxv-xmvr","PYSEC-2023-67","UBUNTU-CVE-2023-32323"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Matrix homeserver","requires_auth":"low_privilege","summary":"A malicious user can disable outbound federation to specific hosts by sending oversized invite events, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"synapse","vendor":"matrix"}],"cvss":{"score":5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized `invite_room_state` fields. Server operators should upgrade to Synapse 1.74 or newer urgently.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites","id":"CVE-2023-32323","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2023"},"n_packages":3,"n_references":4,"next":{"headline":"OpenPrinting CUPS vulnerable to heap buffer overflow","id":"CVE-2023-32324"},"packages":[{"ecosystem":"PyPI","fixed":["1.74.0"],"introduced":["0"],"last_affected":[],"package":"matrix-synapse","purl":null,"source":"GHSA-f3wc-3vxv-xmvr"},{"ecosystem":"PyPI","fixed":["1.74.0"],"introduced":["0"],"last_affected":[],"package":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","source":"GHSA-f3wc-3vxv-xmvr"},{"ecosystem":"PyPI","fixed":["1.74.0"],"introduced":["0"],"last_affected":[],"package":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","source":"PYSEC-2023-67"}],"prev":{"headline":"Arbitrary file read in Ombi","id":"CVE-2023-32322"},"products":["synapse"],"published":"2023-05-26","related":[{"cvss_score":9.8,"headline":"Improper Verification of Cryptographic Signature in matrix-synapse","id":"CVE-2019-18835","kev_date_added":null,"published":"2019-11-07"},{"cvss_score":8.7,"headline":"Synapse allows a a malformed invite to break the invitee's `/sync`","id":"CVE-2024-52815","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":8.2,"headline":"Synapse allows unsupported content types to lead to memory exhaustion","id":"CVE-2024-52805","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":8.2,"headline":"Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders","id":"CVE-2024-53863","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":7.5,"headline":"Synapse denial of service through media disk space consumption","id":"CVE-2024-37302","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":7.5,"headline":"Matrix Synapse Authorization Error","id":"CVE-2018-12423","kev_date_added":null,"published":"2018-06-14"},{"cvss_score":7.5,"headline":"Matrix Synapse Security Filtering Flaw","id":"CVE-2018-12291","kev_date_added":null,"published":"2018-06-13"}],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-13","vendors":["matrix-org"]},"summary":"A malicious user can disable outbound federation to specific hosts by sending oversized invite events, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2023-32323/"}