{"answers":{"affected":"3 open source packages ship an affected version, including matrix-sydent. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-29431 in the wild and no public exploit code.","fix":"Upgrade matrix-sydent to 2.3.0 or later.","what":"CVE-2021-29431 is a high-severity server-side request forgery vulnerability in matrix-org sydent, published on 15 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-29431 and fix it if it is affected.\n\nWhat it is: CVE-2021-29431 is a high-severity server-side request forgery vulnerability in matrix-org sydent, published on 15 Apr 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-2021-29431 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- matrix-sydent (PyPI): affected all versions; fixed in 2.3.0\n- matrix-sydent (PyPI): affected all versions; fixed in 2.3.0\n- matrix-sydent (PyPI): affected all versions; fixed in 2.3.0\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-2021-29431/ (Markdown: https://insights.sbomify.com/CVE-2021-29431/index.md)","id":"CVE-2021-29431","markdown":"https://insights.sbomify.com/CVE-2021-29431/index.md","name":"CVE-2021-29431","record":{"aliases":["GHSA-9jhm-8m8c-c3f4","PYSEC-2021-22"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Matrix identity server","requires_auth":"low_privilege","summary":"Attackers can induce Sydent to send HTTP requests to internal systems, enabling port enumeration and potential internal network access.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sydent","vendor":"matrix"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.","ecosystems":["PyPI"],"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":"SSRF in Sydent due to missing validation of hostnames","id":"CVE-2021-29431","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"ssrf","year":"2021"},"n_packages":3,"n_references":7,"next":{"headline":"Malicious users could control the content of invitation emails","id":"CVE-2021-29432"},"packages":[{"ecosystem":"PyPI","fixed":["2.3.0"],"introduced":["0"],"last_affected":[],"package":"matrix-sydent","purl":null,"source":"GHSA-9jhm-8m8c-c3f4"},{"ecosystem":"PyPI","fixed":["2.3.0"],"introduced":["0"],"last_affected":[],"package":"matrix-sydent","purl":"pkg:pypi/matrix-sydent","source":"GHSA-9jhm-8m8c-c3f4"},{"ecosystem":"PyPI","fixed":["2.3.0"],"introduced":["0"],"last_affected":[],"package":"matrix-sydent","purl":"pkg:pypi/matrix-sydent","source":"PYSEC-2021-22"}],"prev":{"headline":"Denial of service attack via memory exhaustion","id":"CVE-2021-29430"},"products":["sydent"],"published":"2021-04-15","related":[{"cvss_score":9.3,"headline":"Sydent does not verify email server certificates","id":"CVE-2023-38686","kev_date_added":null,"published":"2023-08-04"},{"cvss_score":7.5,"headline":"Denial of service attack via memory exhaustion","id":"CVE-2021-29430","kev_date_added":null,"published":"2021-04-15"},{"cvss_score":7.5,"headline":"matrix-sydent and matrix-synapse Use Cryptographically Weak PRNG","id":"CVE-2019-11842","kev_date_added":null,"published":"2019-05-09"},{"cvss_score":5.9,"headline":"Matrix Sydent mishandles emails","id":"CVE-2019-11340","kev_date_added":null,"published":"2019-04-19"},{"cvss_score":5.3,"headline":"Malicious users could control the content of invitation emails","id":"CVE-2021-29432","kev_date_added":null,"published":"2021-04-15"},{"cvss_score":4.3,"headline":"Denial of service (via resource exhaustion) due to improper input validation","id":"CVE-2021-29433","kev_date_added":null,"published":"2021-04-15"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["matrix-org"]},"summary":"Attackers can induce Sydent to send HTTP requests to internal systems, enabling port enumeration and potential internal network access.","url":"https://insights.sbomify.com/CVE-2021-29431/"}