{
"id": "GHSA-gwcr-j4wh-j3cq",
"aliases": [
"CVE-2021-28169"
],
"details": "Requests to the `ConcatServlet` and `WelcomeFilter` are able to access protected resources within the `WEB-INF` directory. For example a request to the `ConcatServlet` with a URI of `/concat?/%2557EB-INF/web.xml` can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.\n\nThis occurs because both `ConcatServlet` and `WelcomeFilter` decode the supplied path to verify it is not within the `WEB-INF` or `META-INF` directories. It then uses this decoded path to call `RequestDispatcher` which will also do decoding of the path. This double decoding allows paths with a doubly encoded `WEB-INF` to bypass this security check.\n\n### Impact\nThis affects all versions of `ConcatServlet` and `WelcomeFilter` in versions before 9.4.41, 10.0.3 and 11.0.3.\n\n### Workarounds\n\nIf you cannot update to the latest version of Jetty, you can instead deploy your own version of the [`ConcatServlet`](https://github.com/eclipse/jetty.project/blob/4204526d2fdad355e233f6bf18a44bfe028ee00b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/ConcatServlet.java) and/or the [`WelcomeFilter`](https://github.com/eclipse/jetty.project/blob/4204526d2fdad355e233f6bf18a44bfe028ee00b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/WelcomeFilter.java) by using the code from the latest version of Jetty.\n",
"summary": "Jetty Utility Servlets ConcatServlet Double Decoding Information Disclosure Vulnerability",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "9.4.41"
}
]
}
],
"package": {
"name": "org.eclipse.jetty:jetty-servlets",
"ecosystem": "Maven"
},
"database_specific": {
"last_known_affected_version_range": "<= 9.4.40"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "10.0.0"
},
{
"fixed": "10.0.3"
}
]
}
],
"package": {
"name": "org.eclipse.jetty:jetty-servlets",
"ecosystem": "Maven"
},
"database_specific": {
"last_known_affected_version_range": "<= 10.0.2"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "11.0.0"
},
{
"fixed": "11.0.3"
}
]
}
],
"package": {
"name": "org.eclipse.jetty:jetty-servlets",
"ecosystem": "Maven"
},
"database_specific": {
"last_known_affected_version_range": "<= 11.0.2"
}
}
],
"modified": "2022-02-08T21:23:08Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"published": "2021-06-10T15:43:22Z",
"references": [
{
"url": "https://github.com/eclipse/jetty.project/security/advisories/GHSA-gwcr-j4wh-j3cq",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28169",
"type": "ADVISORY"
},
{
"url": "https://www.oracle.com/security-alerts/cpuoct2021.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.debian.org/security/2021/dsa-4949",
"type": "WEB"
},
{
"url": "https://security.netapp.com/advisory/ntap-20210727-0009",
"type": "WEB"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00017.html",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/rfff6ff8ffb31e8a32619c79774def44b6ffbb037c128c5ad3eab7171@%3Cissues.zookeeper.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/rf36f1114e84a3379b20587063686148e2d5a39abc0b8a66ff2a9087a@%3Cissues.zookeeper.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/ref1c161a1621504e673f9197b49e6efe5a33ce3f0e6d8f1f804fc695@%3Cjira.kafka.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/rddbb4f8d5db23265bb63d14ef4b3723b438abc1589f877db11d35450@%3Cissues.zookeeper.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/rd5b52362f5edf98e0dcab6541a381f571cccc05ad9188e793af688f3@%3Cjira.kafka.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/rbefa055282d52d6b58d29a79fbb0be65ab0a38d25f00bd29eaf5e6fd@%3Cnotifications.zookeeper.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/rb1292d30462b9baedea7c5d9594fc75990d9aa0ec223b48054ca9c25@%3Cjira.kafka.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/r91e34ff61aff8fd25a3f2a21539597c6ef7589a31c199b0a9546477c@%3Cjira.kafka.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/r8a1a332899a1f92c8118b0895b144b27a78e3f25b9d58a34dd5eb084@%3Cnotifications.zookeeper.apache.org%3E",
"type": "WEB"
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{
"url": "https://lists.apache.org/thread.html/r67c4f90658fde875521c949448c54c98517beecdc7f618f902c620ec@%3Cissues.zookeeper.apache.org%3E",
"type": "WEB"
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{
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{
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"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/r284de9c5399486dfff12ab9e7323ca720dd7019a9a3e11c8510a7140@%3Cjira.kafka.apache.org%3E",
"type": "WEB"
},
{
"url": "https://lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe@%3Cusers.kafka.apache.org%3E",
"type": "WEB"
},
{
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"type": "WEB"
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{
"url": "https://lists.apache.org/thread.html/r04a4b4553a23aff26f42635a6ae388c3b162aab30a88d12e59d05168@%3Cjira.kafka.apache.org%3E",
"type": "WEB"
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{
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"type": "PACKAGE"
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],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-200"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2021-06-09T02:15:00Z",
"github_reviewed_at": "2021-06-09T20:02:50Z"
}
}