CVE-2019-17571

log4j: deserialization of untrusted data in SocketServer

Published Dec 20, 2019 CVSS 3.1 · 9.8 Critical EPSS 70.0% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2065-1 apache-log4j1.2 security update
Debian DSA Debian DSA DSA-4686-1 apache-log4j1.2 security update
Github GHSA Github GHSA GHSA-2qrg-x229-3v8q Deserialization of Untrusted Data in Log4j
Ubuntu USN Ubuntu USN USN-4495-1 Apache Log4j vulnerability
Ubuntu USN Ubuntu USN USN-5998-1 Apache Log4j vulnerabilities
References
Link Providers
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00022.html cve-icon cve-icon
https://lists.apache.org/thread.html/277b4b5c2b0e06a825ccec565fa65bd671f35a4d58e3e2ec5d0618e1%40%3Cdev.tika.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/44491fb9cc19acc901f7cff34acb7376619f15638439416e3e14761c%40%3Cdev.tika.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/479471e6debd608c837b9815b76eab24676657d4444fcfd5ef96d6e6%40%3Cdev.tika.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/564f03b4e9511fcba29c68fc0299372dadbdb002718fa8edcc4325e4%40%3Cjira.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/6114ce566200d76e3cc45c521a62c2c5a4eac15738248f58a99f622c%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/752ec92cd1e334a639e79bfbd689a4ec2c6579ec5bb41b53ffdf358d%40%3Cdev.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/8ab32b4c9f1826f20add7c40be08909de9f58a89dc1de9c09953f5ac%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/eea03d504b36e8f870e8321d908e1def1addda16adda04327fe7c125%40%3Cdev.logging.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r05755112a8c164abc1004bb44f198b1e3d8ca3d546a8f13ebd3aa05f%40%3Cissues.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r107c8737db39ec9ec4f4e7147b249e29be79170b9ef4b80528105a2d%40%3Cdev.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r13d4b5c60ff63f3c4fab51d6ff266655be503b8a1884e2f2fab67c3a%40%3Ccommon-issues.hadoop.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r189aaeaad897f7d6b96f7c43a8ef2dfb9f6e9f8c1cc9ad182ce9b9ae%40%3Cjira.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r18f1c010b554a3a2d761e8ffffd8674fd4747bcbcf16c643d708318c%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r1b7734dfdfd938640f2f5fb6f4231a267145c71ed60cc7faa1cbac07%40%3Ccommon-issues.hadoop.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r26244f9f7d9a8a27a092eb0b2a0ca9395e88fcde8b5edaeca7ce569c%40%3Ccommon-issues.hadoop.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2756fd570b6709d55a61831ca028405bcb3e312175a60bc5d911c81f%40%3Cjira.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2ce8d26154bea939536e6cf27ed02d3192bf5c5d04df885a80fe89b3%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2ff63f210842a3c5e42f03a35d8f3a345134d073c80a04077341c211%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3543ead2317dcd3306f69ee37b07dd383dbba6e2f47ff11eb55879ad%40%3Cusers.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r356d57d6225f91fdc30f8b0a2bed229d1ece55e16e552878c5fa809a%40%3Cissues.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3784834e80df2f284577a5596340fb84346c91a2dea6a073e65e3397%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3a85514a518f3080ab1fc2652cfe122c2ccf67cfb32356acb1b08fe8%40%3Cdev.tika.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3bf7b982dfa0779f8a71f843d2aa6b4184a53e6be7f149ee079387fd%40%3Cdev.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3c575cabc7386e646fb12cb82b0b38ae5a6ade8a800f827107824495%40%3Cjira.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3cf50d05ce8cec8c09392624b7bae750e7643dae60ef2438641ee015%40%3Cissues.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3d666e4e8905157f3c046d31398b04f2bfd4519e31f266de108c6919%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r48d5019bd42e0770f7e5351e420a63a41ff1f16924942442c6aff6a8%40%3Ccommits.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r48efc7cb5aeb4e1f67aaa06fb4b5479a5635d12f07d0b93fc2d08809%40%3Ccommits.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r4ac89cbecd9e298ae9fafb5afda6fa77ac75c78d1ac957837e066c4e%40%3Cuser.zookeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r4b25538be50126194cc646836c718b1a4d8f71bd9c912af5b59134ad%40%3Cdev.tika.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r52a5129df402352adc34d052bab9234c8ef63596306506a89fdc7328%40%3Cusers.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r594411f4bddebaf48a4c70266d0b7849e0d82bb72826f61b3a35bba7%40%3Cissues.bookkeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r5c084578b3e3b40bd903c9d9e525097421bcd88178e672f612102eb2%40%3Cjira.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r61590890edcc64140e0c606954b29a063c3d08a2b41d447256d51a78%40%3Cissues.activemq.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6236b5f8646d48af8b66d5050f288304016840788e508c883356fe0e%40%3Clog4j-user.logging.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r681b4432d0605f327b68b9f8a42662993e699d04614de4851c35ffd1%40%3Cdev.tika.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r696507338dd5f44efc23d98cafe30f217cf3ba78e77ed1324c7a5179%40%3Cjira.kafka.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6aec6b8f70167fa325fb98b3b5c9ce0ffaed026e697b69b85ac24628%40%3Cissues.zookeeper.apache.org%3E cve-icon cve-icon
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https://lists.debian.org/debian-lts-announce/2020/01/msg00008.html cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2019-17571 cve-icon
https://security.netapp.com/advisory/ntap-20200110-0001/ cve-icon cve-icon
https://usn.ubuntu.com/4495-1/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2019-17571 cve-icon
https://www.debian.org/security/2020/dsa-4686 cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuApr2021.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuapr2020.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuapr2022.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpujul2020.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpujul2022.html cve-icon cve-icon
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Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics epss

{'score': 0.53459}

epss

{'score': 0.5403}

Type Values Removed Values Added
Metrics epss

{'score': 0.5403}

epss

{'score': 0.53459}

Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
May 28, 2026, 6:30 PM
Reserved
Oct 14, 2019, 12:00 AM
Status
Modified
Published
Dec 20, 2019, 5:15 PM
Modified
Jun 17, 2026, 2:24 AM
Severity
Important
Public date
Dec 20, 2019, 12:00 AM