RHSA-2009:1087

Vulnerability from csaf_redhat - Published: 2009-06-09 14:31 - Updated: 2026-06-25 10:35
Summary
Red Hat Security Advisory: mod_jk security update
Severity
Important
Notes
Topic: Updated mod_jk packages that fix one security issue are now available for Red Hat Application Server v2. This update has been rated as having important security impact by the Red Hat Security Response Team.
Details: mod_jk is an Apache Tomcat connector that allows Apache Tomcat and the Apache HTTP Server to communicate with each other. An information disclosure flaw was found in mod_jk. In certain situations, if a faulty client set the "Content-Length" header without providing data, or if a user sent repeated requests very quickly, one user may view a response intended for another user. (CVE-2008-5519) All mod_jk users are advised to upgrade to these updated packages. They provide mod_jk 1.2.28, which is not vulnerable to this issue.
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.

The JK Connector (aka mod_jk) 1.2.0 through 1.2.26 in Apache Tomcat allows remote attackers to obtain sensitive information via an arbitrary request from an HTTP client, in opportunistic circumstances involving (1) a request from a different client that included a Content-Length header but no POST data or (2) a rapid series of requests, related to noncompliance with the AJP protocol's requirements for requests containing Content-Length headers.

Affected products
Product Identifier Version Remediation
Unresolved product id: 4AS-RHAPS2:mod_jk-0:1.2.28-1jpp_3rh.src —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.ppc —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.ppc —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.ppc —
Vendor Fix fix
Unresolved product id: 4AS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-0:1.2.28-1jpp_3rh.src —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4ES-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-0:1.2.28-1jpp_3rh.src —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-ap20-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-debuginfo-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.i386 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.ia64 —
Vendor Fix fix
Unresolved product id: 4WS-RHAPS2:mod_jk-manual-0:1.2.28-1jpp_3rh.x86_64 —
Vendor Fix fix
Threats
Impact Important

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        {
          "category": "description",
          "text": "The JK Connector (aka mod_jk) 1.2.0 through 1.2.26 in Apache Tomcat allows remote attackers to obtain sensitive information via an arbitrary request from an HTTP client, in opportunistic circumstances involving (1) a request from a different client that included a Content-Length header but no POST data or (2) a rapid series of requests, related to noncompliance with the AJP protocol\u0027s requirements for requests containing Content-Length headers.",
          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          ],
          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2009:1087"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "mod_jk: session information leak"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.