rhsa-2012_0475
Vulnerability from csaf_redhat
Published
2012-04-11 17:12
Modified
2024-09-15 19:29
Summary
Red Hat Security Advisory: tomcat6 security update
Notes
Topic
Updated tomcat6 packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
Details
Apache Tomcat is a servlet container for the Java Servlet and JavaServer
Pages (JSP) technologies.
It was found that the Java hashCode() method implementation was susceptible
to predictable hash collisions. A remote attacker could use this flaw to
cause Tomcat to use an excessive amount of CPU time by sending an HTTP
request with a large number of parameters whose names map to the same hash
value. This update introduces a limit on the number of parameters processed
per request to mitigate this issue. The default limit is 512 for
parameters and 128 for headers. These defaults can be changed by setting
the org.apache.tomcat.util.http.Parameters.MAX_COUNT and
org.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties.
(CVE-2011-4858)
It was found that Tomcat did not handle large numbers of parameters and
large parameter values efficiently. A remote attacker could make Tomcat
use an excessive amount of CPU time by sending an HTTP request containing a
large number of parameters or large parameter values. This update
introduces limits on the number of parameters and headers processed per
request to address this issue. Refer to the CVE-2011-4858 description for
information about the org.apache.tomcat.util.http.Parameters.MAX_COUNT and
org.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties.
(CVE-2012-0022)
Red Hat would like to thank oCERT for reporting CVE-2011-4858. oCERT
acknowledges Julian Wälde and Alexander Klink as the original reporters of
CVE-2011-4858.
Users of Tomcat should upgrade to these updated packages, which correct
these issues. Tomcat must be restarted for this update to take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "Apache Tomcat is a servlet container for the Java Servlet and JavaServer\nPages (JSP) technologies.\n\nIt was found that the Java hashCode() method implementation was susceptible\nto predictable hash collisions. A remote attacker could use this flaw to\ncause Tomcat to use an excessive amount of CPU time by sending an HTTP\nrequest with a large number of parameters whose names map to the same hash\nvalue. This update introduces a limit on the number of parameters processed\nper request to mitigate this issue. The default limit is 512 for\nparameters and 128 for headers. These defaults can be changed by setting\nthe org.apache.tomcat.util.http.Parameters.MAX_COUNT and\norg.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties.\n(CVE-2011-4858)\n\nIt was found that Tomcat did not handle large numbers of parameters and\nlarge parameter values efficiently. A remote attacker could make Tomcat\nuse an excessive amount of CPU time by sending an HTTP request containing a\nlarge number of parameters or large parameter values. This update\nintroduces limits on the number of parameters and headers processed per\nrequest to address this issue. Refer to the CVE-2011-4858 description for\ninformation about the org.apache.tomcat.util.http.Parameters.MAX_COUNT and\norg.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties.\n(CVE-2012-0022) \n\nRed Hat would like to thank oCERT for reporting CVE-2011-4858. oCERT\nacknowledges Julian W\u00e4lde and Alexander Klink as the original reporters of\nCVE-2011-4858.\n\nUsers of Tomcat should upgrade to these updated packages, which correct\nthese issues. Tomcat must be restarted for this update to take effect.",
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2011-4858"
},
{
"category": "external",
"summary": "RHBZ#750521",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=750521"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2011-4858",
"url": "https://www.cve.org/CVERecord?id=CVE-2011-4858"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-4858",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-4858"
}
],
"release_date": "2011-12-28T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "tomcat: hash table collisions CPU usage DoS (oCERT-2011-003)"
},
{
"cve": "CVE-2012-0022",
"discovery_date": "2012-01-17T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "783359"
}
],
"notes": [
{
"category": "description",
"text": "Apache Tomcat 5.5.x before 5.5.35, 6.x before 6.0.34, and 7.x before 7.0.23 uses an inefficient approach for handling parameters, which allows remote attackers to cause a denial of service (CPU consumption) via a request that contains many parameters and parameter values, a different vulnerability than CVE-2011-4858.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "tomcat: large number of parameters DoS",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2012-0022"
},
{
"category": "external",
"summary": "RHBZ#783359",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=783359"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2012-0022",
"url": "https://www.cve.org/CVERecord?id=CVE-2012-0022"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2012-0022",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2012-0022"
}
],
"release_date": "2012-01-17T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
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"accessVector": "NETWORK",
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"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "tomcat: large number of parameters DoS"
}
]
}
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