{"id":"CVE-2021-21290","title":"Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients","summary":"Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty before version 4.1.59.Final there is a vulnerability on Unix-lik…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-378","CWE-379","CWE-668","CWE-200"],"vendor":"netty","product":"netty","affected":["netty < 4.1.59","debian_linux = 9.0","debian_linux = 10.0","quarkus <= 1.13.7","banking_corporate_lending_process_management = 14.2.0","banking_corporate_lending_process_management = 14.3.0","banking_corporate_lending_process_management = 14.5.0","banking_credit_facilities_process_management = 14.2.0","banking_credit_facilities_process_management = 14.3.0","banking_credit_facilities_process_management = 14.5.0","banking_trade_finance_process_management = 14.2.0","banking_trade_finance_process_management = 14.3.0","banking_trade_finance_process_management = 14.5.0","communications_brm_-_elastic_charging_engine = 12.0.0.3","communications_design_studio = 7.4.2","communications_messaging_server = 8.1","nosql_database < 20.3","active_iq_unified_manager","cloud_secure_agent","snapcenter"],"patched":["netty 4.1.59","nosql_database 20.3"],"published":"2021-02-08","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:17:04.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-21290","references":[{"url":"https://github.com/netty/netty/commit/c735357bf29d07856ad171c6611a2e1a0e0000ec","label":"security-advisories@github.com"},{"url":"https://github.com/netty/netty/security/advisories/GHSA-5mcr-gq6c-3hq2","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r0053443ce19ff125981559f8c51cf66e3ab4350f47812b8cf0733a05%40%3Cdev.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r02e467123d45006a1dda20a38349e9c74c3a4b53e2e07be0939ecb3f%40%3Cdev.ranger.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r0857b613604c696bf9743f0af047360baaded48b1c75cf6945a083c5%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r10308b625e49d4e9491d7e079606ca0df2f0a4d828f1ad1da64ba47b%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r1908a34b9cc7120e5c19968a116ddbcffea5e9deb76c2be4fa461904%40%3Cdev.zookeeper.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r2748097ea4b774292539cf3de6e3b267fc7a88d6c8ec40f4e2e87bd4%40%3Cdev.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r2936730ef0a06e724b96539bc7eacfcd3628987c16b1b99c790e7b87%40%3Cissues.zookeeper.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r2fda4dab73097051977f2ab818f75e04fbcb15bb1003c8530eac1059%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r326ec431f06eab7cb7113a7a338e59731b8d556d05258457f12bac1b%40%3Cdev.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r4efed2c501681cb2e8d629da16e48d9eac429624fd4c9a8c6b8e7020%40%3Cdev.tinkerpop.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r584cf871f188c406d8bd447ff4e2fd9817fca862436c064d0951a071%40%3Ccommits.pulsar.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r59bac5c09f7a4179b9e2460e8f41c278aaf3b9a21cc23678eb893e41%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r5bf303d7c04da78f276765da08559fdc62420f1df539b277ca31f63b%40%3Cissues.zookeeper.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r5c701840aa2845191721e39821445e1e8c59711e71942b7796a6ec29%40%3Cusers.activemq.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r5e4a540089760c8ecc2c411309d74264f1dad634ad93ad583ca16214%40%3Ccommits.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r5e66e286afb5506cdfe9bbf68a323e8d09614f6d1ddc806ed0224700%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r71dbb66747ff537640bb91eb0b2b24edef21ac07728097016f58b01f%40%3Ccommits.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r743149dcc8db1de473e6bff0b3ddf10140a7357bc2add75f7d1fbb12%40%3Cdev.zookeeper.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r790c2926efcd062067eb18fde2486527596d7275381cfaff2f7b3890%40%3Cissues.bookkeeper.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r7bb3cdc192e9a6f863d3ea05422f09fa1ae2b88d4663e63696ee7ef5%40%3Cdev.ranger.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r9924ef9357537722b28d04c98a189750b80694a19754e5057c34ca48%40%3Ccommits.pulsar.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/ra0fc2b4553dd7aaf75febb61052b7f1243ac3a180a71c01f29093013%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/ra503756ced78fdc2136bd33e87cb7553028645b261b1f5c6186a121e%40%3Cjira.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/rb06c1e766aa45ee422e8261a8249b561784186483e8f742ea627bda4%40%3Cdev.kafka.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/rb51d6202ff1a773f96eaa694b7da4ad3f44922c40b3d4e1a19c2f325%40%3Ccommits.pulsar.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/rb592033a2462548d061a83ac9449c5ff66098751748fcd1e2d008233%40%3Cissues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Overview\n\nNetty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty before version 4.1.59.Final there is a vulnerability on Unix-like systems involving an insecure temp file. When netty's multipart decoders are used local information disclosure can occur via the local system temporary directory if temporary storing uploads on the disk is enabled. On unix-like systems, the temporary directory is shared between all user. As such, writing to this directory using APIs that do not explicitly set the file/directory permissions can lead to information disclosure. Of note, this does not impact modern MacOS Operating Systems. The method \"File.createTempFile\" on unix-like systems creates a random file, but, by default will create this file with the permissions \"-rw-r--r--\". Thus, if sensitive information is written to this file, other local users can read this information. This is the case in netty's \"AbstractDiskHttpData\" is vulnerable. This has been fixed in version 4.1.59.Final. As a workaround, one may specify your own \"java.io.tmpdir\" when you start the JVM or use \"DefaultHttpDataFactory.setBaseDir(...)\" to set the directory to something that is only readable by the current user.\n\n## Affected\n\n- `netty < 4.1.59`\n- `debian_linux = 9.0`\n- `debian_linux = 10.0`\n- `quarkus <= 1.13.7`\n- `banking_corporate_lending_process_management = 14.2.0`\n- `banking_corporate_lending_process_management = 14.3.0`\n- `banking_corporate_lending_process_management = 14.5.0`\n- `banking_credit_facilities_process_management = 14.2.0`\n- `banking_credit_facilities_process_management = 14.3.0`\n- `banking_credit_facilities_process_management = 14.5.0`\n- `banking_trade_finance_process_management = 14.2.0`\n- `banking_trade_finance_process_management = 14.3.0`\n- `banking_trade_finance_process_management = 14.5.0`\n- `communications_brm_-_elastic_charging_engine = 12.0.0.3`\n- `communications_design_studio = 7.4.2`\n- `communications_messaging_server = 8.1`\n- `nosql_database < 20.3`\n- `active_iq_unified_manager`\n- `cloud_secure_agent`\n- `snapcenter`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `netty 4.1.59`\n- `nosql_database 20.3`\n\n## Vendor advisories\n\n- **RHSA-2021:2046** · Red Hat · fixed in: Red Hat JBoss EAP 7.3 for RHEL 6 Server · released 2021-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2021:2046)\n- **RHSA-2021:1511** · Red Hat · fixed in: Red Hat AMQ Clients 2 · released 2021-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2021:1511)\n- **RHSA-2022:0190** · Red Hat · fixed in: Red Hat Satellite Capsule 6.10, Red Hat Satellite 6.10 · released 2022-01-19 · [advisory](https://access.redhat.com/errata/RHSA-2022:0190)\n- **RHSA-2021:2047** · Red Hat · fixed in: Red Hat JBoss EAP 7.3 for RHEL 7 Server · released 2021-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2021:2047)\n- **RHSA-2022:5498** · Red Hat · fixed in: Red Hat Satellite 6.11 for RHEL 7, Red Hat Satellite 6.11 for RHEL 8 · released 2022-07-05 · [advisory](https://access.redhat.com/errata/RHSA-2022:5498)\n- **RHSA-2021:2048** · Red Hat · fixed in: Red Hat JBoss EAP 7.3 for BaseOS-8 · released 2021-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2021:2048)\n- **RHSA-2022:1110** · Red Hat · fixed in: RHDM 7.12.1 · released 2022-03-29 · [advisory](https://access.redhat.com/errata/RHSA-2022:1110)\n- **RHSA-2022:1108** · Red Hat · fixed in: RHPAM 7.12.1 · released 2022-03-29 · [advisory](https://access.redhat.com/errata/RHSA-2022:1108)\n- **RHSA-2021:2689** · Red Hat · fixed in: Red Hat AMQ 7.8.2 · released 2021-07-12 · [advisory](https://access.redhat.com/errata/RHSA-2021:2689)\n- **RHSA-2021:3700** · Red Hat · fixed in: Red Hat AMQ 7.9.0 · released 2021-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2021:3700)\n- **RHSA-2021:0986** · Red Hat · fixed in: Red Hat AMQ Online 1.7.0 GA · released 2021-03-25 · [advisory](https://access.redhat.com/errata/RHSA-2021:0986)\n- **Red Hat VEX** · Moderate · affected: Red Hat JBoss A-MQ 6, Red Hat JBoss Data Grid 7, Red Hat JBoss Enterprise Application Platform 5, Red Hat JBoss Enterprise Application Platform 6, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat JBoss Fuse 6, … · no fix planned: Red Hat JBoss A-MQ 6, Red Hat JBoss Data Grid 7, Red Hat JBoss Enterprise Application Platform 5, Red Hat JBoss Enterprise Application Platform 6, … · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21290.json)","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}