Medium
Security advisory
The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-0762
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:41 UTC · Revision 1
Source evidence
The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.
osv:CVE-2016-0762
Complete source record
{
"id": "9ffde4953732aca1ec5434108d4c87580ee0bc4affb7c9de95b4be60f724b085",
"url": "https://osv.dev/vulnerability/CVE-2016-0762",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-0762",
"summary": "The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.",
"evidence": "osv:CVE-2016-0762",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2016-0762",
"aliases": [
"CVE-2016-0762",
"GHSA-wxcp-f2c8-x6xv"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/tomcat",
"type": "GIT",
"events": [
{
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},
{
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},
{
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},
{
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},
{
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},
{
"last_affected": "45f8fd74cdb96490fab8709263a4d862f0d429cf"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0"
},
{
"last_affected": "7.0.70"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
"range": [
{
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},
{
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}
],
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},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:*",
"range": [
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{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone2"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:*",
"range": [
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},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone4"
},
{
"last_affected": "9.0.0-milestone4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone5"
},
{
"last_affected": "9.0.0-milestone5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone6"
},
{
"last_affected": "9.0.0-milestone6"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone7:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone7"
},
{
"last_affected": "9.0.0-milestone7"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone8:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone8"
},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:apache:tomcat:9.0.0:milestone9:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0-milestone9"
},
{
"last_affected": "9.0.0-milestone9"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"9.0.0-milestone1",
"9.0.0-milestone2",
"9.0.0-milestone3",
"9.0.0-milestone4",
"9.0.0-milestone5",
"9.0.0-milestone6",
"9.0.0-milestone7",
"9.0.0-milestone8",
"9.0.0-milestone9"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-0762.json"
}
}
],
"modified": "2026-10-24T10:30:32.424790160Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/1872f96bad43647832bdd84a408794cd06d9cbb557af63085ca10009%40%3Cannounce.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E",
"https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E",
"https://access.redhat.com/errata/RHSA-2017:0455",
"https://access.redhat.com/errata/RHSA-2017:0456",
"https://access.redhat.com/errata/RHSA-2017:2247",
"https://security.netapp.com/advisory/ntap-20180605-0001/",
"https://usn.ubuntu.com/4557-1/",
"https://www.oracle.com//security-alerts/cpujul2021.html",
"https://www.oracle.com/security-alerts/cpuoct2021.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*"
],
"vendor_product": "apache:tomcat",
"extracted_events": [
{
"range": [
{
"introduced": "6.0.0"
},
{
"last_affected": "6.0.45"
},
{
"introduced": "8.0"
},
{
"last_affected": "8.0.36"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_diameter_signaling_router",
"extracted_events": [
{
"range": [
{
"introduced": "8.0.0"
},
{
"last_affected": "8.5.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:tekelec_platform_distribution",
"extracted_events": [
{
"range": [
{
"introduced": "7.4.0"
},
{
"last_affected": "7.7.1"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
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{
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{
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},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
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],
"vendor_product": "redhat:enterprise_linux_desktop",
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{
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},
{
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}
],
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}
]
},
{
"cpes": [
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"cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:*"
],
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{
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{
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{
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{
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{
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{
"introduced": "7.7"
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{
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}
],
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}
]
},
{
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],
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{
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{
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}
],
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}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*"
],
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{
"range": [
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"introduced": "7.4"
},
{
"last_affected": "7.4"
},
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
},
{
"introduced": "7.7"
},
{
"last_affected": "7.7"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_tus",
"extracted_events": [
{
"range": [
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
},
{
"introduced": "7.7"
},
{
"last_affected": "7.7"
}
],
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}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_workstation",
"extracted_events": [
{
"range": [
{
"introduced": "7.0"
},
{
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}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:jboss_enterprise_web_server:3.0.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:jboss_enterprise_web_server",
"extracted_events": [
{
"range": [
{
"introduced": "3.0.0"
},
{
"last_affected": "3.0.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-0762",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433024,
"published_at": "2017-08-10T16:29:00.313+00:00"
}