rhsa-2023:6496
Vulnerability from csaf_redhat
Published
2023-11-07 08:18
Modified
2025-05-06 16:49
Summary
Red Hat Security Advisory: haproxy security and bug fix update

Notes

Topic
An update for haproxy is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The haproxy packages provide a reliable, high-performance network load balancer for TCP and HTTP-based applications. Security Fix(es): * haproxy: data leak via fcgi requests (CVE-2023-0836) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes linked from the References section.
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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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Youfu Zhang"
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          "organization": "Chaitin Security Research Lab"
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      "cve": "CVE-2023-0836",
      "cwe": {
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        "name": "Incomplete Cleanup"
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          "text": "2180746"
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          "category": "description",
          "text": "A flaw was found in HAProxy, which could allow a remote attacker to obtain sensitive information caused by improper initialization when encoding the FCGI_BEGIN_REQUEST record. By sending a specially crafted request, an attacker could exploit this vulnerability to obtain sensitive information and use this information to launch further attacks against the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "haproxy: data leak via fcgi requests",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-459: Incomplete Cleanup vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low.\n\nThe platform\u0027s ephemeral workloads, strict lifecycle management, and automated resource cleanup routines significantly reduce the likelihood that residual data would persist in a meaningful or exploitable state. Static code analysis and peer code review techniques are used to execute robust input validation and error-handling mechanisms to ensure all user inputs are thoroughly validated, reducing the risk of DoS attacks. Event logs are collected and processed for centralization, correlation, analysis, monitoring, reporting, alerting, and retention to detect anomalies and enforce cleanup procedures.",
          "title": "Statement"
        },
        {
          "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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          "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2023-0836"
        },
        {
          "category": "external",
          "summary": "RHBZ#2180746",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2180746"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-0836",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-0836"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-0836",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0836"
        },
        {
          "category": "external",
          "summary": "https://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=2e6bf0a",
          "url": "https://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=2e6bf0a"
        }
      ],
      "release_date": "2022-12-09T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-11-07T08:18:16+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.aarch64",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.ppc64le",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.s390x",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.src",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.x86_64",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.aarch64",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.ppc64le",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.s390x",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.x86_64",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.aarch64",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.ppc64le",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.s390x",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2023:6496"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.aarch64",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.ppc64le",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.s390x",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.src",
            "AppStream-9.3.0.GA:haproxy-0:2.4.22-1.el9.x86_64",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.aarch64",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.ppc64le",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.s390x",
            "AppStream-9.3.0.GA:haproxy-debuginfo-0:2.4.22-1.el9.x86_64",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.aarch64",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.ppc64le",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.s390x",
            "AppStream-9.3.0.GA:haproxy-debugsource-0:2.4.22-1.el9.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "haproxy: data leak via fcgi requests"
    }
  ]
}


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