{
"id": "GHSA-p6xc-xr62-6r2g",
"aliases": [
"CVE-2021-45105"
],
"details": "Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0 and 2.12.3.\n\n\n# Affected packages\nOnly the `org.apache.logging.log4j:log4j-core` package is directly affected by this vulnerability. The `org.apache.logging.log4j:log4j-api` should be kept at the same version as the `org.apache.logging.log4j:log4j-core` package to ensure compatability if in use.",
"summary": "Apache Log4j2 vulnerable to Improper Input Validation and Uncontrolled Recursion",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.4.0"
},
{
"fixed": "2.12.3"
}
]
}
],
"package": {
"name": "org.apache.logging.log4j:log4j-core",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.13.0"
},
{
"fixed": "2.17.0"
}
]
}
],
"package": {
"name": "org.apache.logging.log4j:log4j-core",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.1"
}
]
}
],
"package": {
"name": "org.apache.logging.log4j:log4j-core",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.8.0"
},
{
"fixed": "1.9.2"
}
]
}
],
"package": {
"name": "org.ops4j.pax.logging:pax-logging-log4j2",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.10.0"
},
{
"fixed": "1.10.9"
}
]
}
],
"package": {
"name": "org.ops4j.pax.logging:pax-logging-log4j2",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.11.0"
},
{
"fixed": "1.11.12"
}
]
}
],
"package": {
"name": "org.ops4j.pax.logging:pax-logging-log4j2",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.0.13"
}
]
}
],
"package": {
"name": "org.ops4j.pax.logging:pax-logging-log4j2",
"ecosystem": "Maven"
}
}
],
"modified": "2026-06-09T10:26:50Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
}
],
"published": "2021-12-18T18:00:07Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45105",
"type": "ADVISORY"
},
{
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1541",
"type": "WEB"
},
{
"url": "https://www.oracle.com/security-alerts/cpujul2022.html",
"type": "WEB"
},
{
"url": "https://www.oracle.com/security-alerts/cpujan2022.html",
"type": "WEB"
},
{
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"type": "WEB"
},
{
"url": "https://www.kb.cert.org/vuls/id/930724",
"type": "WEB"
},
{
"url": "https://www.debian.org/security/2021/dsa-5024",
"type": "WEB"
},
{
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd",
"type": "WEB"
},
{
"url": "https://security.netapp.com/advisory/ntap-20211218-0001",
"type": "WEB"
},
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd",
"type": "WEB"
},
{
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032",
"type": "WEB"
},
{
"url": "https://logging.apache.org/log4j/2.x/security.html",
"type": "WEB"
},
{
"url": "https://lists.fedoraproject.org/archives/list/[email protected] /message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ",
"type": "WEB"
},
{
"url": "https://lists.fedoraproject.org/archives/list/[email protected] /message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY",
"type": "WEB"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00017.html",
"type": "WEB"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf",
"type": "WEB"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf",
"type": "WEB"
},
{
"url": "http://www.openwall.com/lists/oss-security/2021/12/19/1",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-674"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2021-12-18T12:15:00Z",
"github_reviewed_at": "2021-12-18T17:59:37Z"
}
}