{"id":"CVE-2019-17571","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-17571","generatedAt":"2026-10-27T22:25:08.223Z","title":"Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for…","description":"Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17.","published":"2019-12-20T17:15:12.000Z","lastModified":"2026-06-17T02:24:11.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":["apache/log4j","debian/debian linux","canonical/ubuntu linux","opensuse/leap","netapp/oncommand system manager","netapp/oncommand workflow automation","oracle/application testing suite","oracle/communications network integrity","oracle/endeca information discovery studio","oracle/financial services lending and leasing","oracle/mysql enterprise monitor","oracle/primavera gateway","oracle/rapid planning","oracle/retail extract transform and load","oracle/retail service backbone","oracle/weblogic server","apache/bookkeeper"],"epss":{"score":0.6998,"percentile":0.99371,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 70.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00022.html","tags":["Mailing List","Third Party Advisory"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/277b4b5c2b0e06a825ccec565fa65bd671f35a4d58e3e2ec5d0618e1%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/44491fb9cc19acc901f7cff34acb7376619f15638439416e3e14761c%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/479471e6debd608c837b9815b76eab24676657d4444fcfd5ef96d6e6%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/564f03b4e9511fcba29c68fc0299372dadbdb002718fa8edcc4325e4%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/6114ce566200d76e3cc45c521a62c2c5a4eac15738248f58a99f622c%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/752ec92cd1e334a639e79bfbd689a4ec2c6579ec5bb41b53ffdf358d%40%3Cdev.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/8ab32b4c9f1826f20add7c40be08909de9f58a89dc1de9c09953f5ac%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/eea03d504b36e8f870e8321d908e1def1addda16adda04327fe7c125%40%3Cdev.logging.apache.org%3E","tags":["Mailing List","Vendor Advisory"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r05755112a8c164abc1004bb44f198b1e3d8ca3d546a8f13ebd3aa05f%40%3Cissues.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r107c8737db39ec9ec4f4e7147b249e29be79170b9ef4b80528105a2d%40%3Cdev.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r13d4b5c60ff63f3c4fab51d6ff266655be503b8a1884e2f2fab67c3a%40%3Ccommon-issues.hadoop.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r189aaeaad897f7d6b96f7c43a8ef2dfb9f6e9f8c1cc9ad182ce9b9ae%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r18f1c010b554a3a2d761e8ffffd8674fd4747bcbcf16c643d708318c%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r1b7734dfdfd938640f2f5fb6f4231a267145c71ed60cc7faa1cbac07%40%3Ccommon-issues.hadoop.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r26244f9f7d9a8a27a092eb0b2a0ca9395e88fcde8b5edaeca7ce569c%40%3Ccommon-issues.hadoop.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r2756fd570b6709d55a61831ca028405bcb3e312175a60bc5d911c81f%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r2ce8d26154bea939536e6cf27ed02d3192bf5c5d04df885a80fe89b3%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r2ff63f210842a3c5e42f03a35d8f3a345134d073c80a04077341c211%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3543ead2317dcd3306f69ee37b07dd383dbba6e2f47ff11eb55879ad%40%3Cusers.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r356d57d6225f91fdc30f8b0a2bed229d1ece55e16e552878c5fa809a%40%3Cissues.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3784834e80df2f284577a5596340fb84346c91a2dea6a073e65e3397%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3a85514a518f3080ab1fc2652cfe122c2ccf67cfb32356acb1b08fe8%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3bf7b982dfa0779f8a71f843d2aa6b4184a53e6be7f149ee079387fd%40%3Cdev.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3c575cabc7386e646fb12cb82b0b38ae5a6ade8a800f827107824495%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3cf50d05ce8cec8c09392624b7bae750e7643dae60ef2438641ee015%40%3Cissues.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r3d666e4e8905157f3c046d31398b04f2bfd4519e31f266de108c6919%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r48d5019bd42e0770f7e5351e420a63a41ff1f16924942442c6aff6a8%40%3Ccommits.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r48efc7cb5aeb4e1f67aaa06fb4b5479a5635d12f07d0b93fc2d08809%40%3Ccommits.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r4ac89cbecd9e298ae9fafb5afda6fa77ac75c78d1ac957837e066c4e%40%3Cuser.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r4b25538be50126194cc646836c718b1a4d8f71bd9c912af5b59134ad%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r52a5129df402352adc34d052bab9234c8ef63596306506a89fdc7328%40%3Cusers.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r594411f4bddebaf48a4c70266d0b7849e0d82bb72826f61b3a35bba7%40%3Cissues.bookkeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r5c084578b3e3b40bd903c9d9e525097421bcd88178e672f612102eb2%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r61590890edcc64140e0c606954b29a063c3d08a2b41d447256d51a78%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r6236b5f8646d48af8b66d5050f288304016840788e508c883356fe0e%40%3Clog4j-user.logging.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r681b4432d0605f327b68b9f8a42662993e699d04614de4851c35ffd1%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r696507338dd5f44efc23d98cafe30f217cf3ba78e77ed1324c7a5179%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r6aec6b8f70167fa325fb98b3b5c9ce0ffaed026e697b69b85ac24628%40%3Cissues.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r6b45a2fcc8e98ac93a179183dbb7f340027bdb8e3ab393418076b153%40%3Ccommon-issues.hadoop.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r6d34da5a0ca17ab08179a30c971446c7421af0e96f6d60867eabfc52%40%3Cissues.bookkeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r71e26f9c2d5826c6f95ad60f7d052d75e1e70b0d2dd853db6fc26d5f%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r746fbc3fc13aee292ae6851f7a5080f592fa3a67b983c6887cdb1fc5%40%3Cdev.tika.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r7a1acc95373105169bd44df710c2f462cad31fb805364d2958a5ee03%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r7bcdc710857725c311b856c0b82cee6207178af5dcde1bd43d289826%40%3Cissues.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r7f462c69d5ded4c0223e014d95a3496690423c5f6f05c09e2f2a407a%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd%40%3Cusers.activemq.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8418a0dff1729f19cf1024937e23a2db4c0f94f2794a423f5c10e8e7%40%3Cissues.bookkeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8890b8f18f1de821595792b58b968a89692a255bc20d86d395270740%40%3Ccommits.druid.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8a1cfd4705258c106e488091fcec85f194c82f2bbde6bd151e201870%40%3Cjira.kafka.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8c392ca48bb7e50754e4bc05865e9731b23d568d18a520fe3d8c1f75%40%3Ccommon-issues.hadoop.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8c6300245c0bcef095e9f07b48157e2c6471df0816db3408fcf1d748%40%3Ccommon-issues.hadoop.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8d78a0fbb56d505461e29868d1026e98c402e6a568c13a6da67896a2%40%3Cdev.jena.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r8e3f7da12bf5750b0a02e69a78a61073a2ac950eed7451ce70a65177%40%3Ccommits.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r909b8e3a36913944d3b7bafe9635d4ca84f8f0e2cd146a1784f667c2%40%3Cissues.zookeeper.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r90c23eb8c82835fa82df85ae5e88c81fd9241e20a22971b0fb8f2c34%40%3Cissues.bookkeeper.apache.org%3E","source":"security@apache.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-17571","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}