rhsa-2024_2337
Vulnerability from csaf_redhat
Published
2024-04-30 10:36
Modified
2024-11-06 05:41
Summary
Red Hat Security Advisory: python3.11-cryptography security update

Notes

Topic
An update for python3.11-cryptography 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 python-cryptography packages contain a Python Cryptographic Authority's (PyCA's) cryptography library, which provides cryptographic primitives and recipes to Python developers. Security Fix(es): * python-cryptography: NULL-dereference when loading PKCS7 certificates (CVE-2023-49083) 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 9.4 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.


To clipboard 

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      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
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      "discovery_date": "2023-12-20T00:00:00+00:00",
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          "text": "2255331"
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          "category": "description",
          "text": "A null-pointer dereference vulnerability was found in python-cryptography during the loading of PKCS7 certificates. Invoking \"load_pem_pkcs7_certificates\" or \"load_der_pkcs7_certificates\" can trigger this issue and lead to subsequent segmentation fault and result in a Denial of Service (DoS) for any application aiming to deserialize a PKCS7 blob or certificate. The potential impact includes disruptions in system availability and stability.",
          "title": "Vulnerability description"
        },
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          "text": "python-cryptography: NULL-dereference when loading PKCS7 certificates",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability arises when functions like \"load_pem_pkcs7_certificates\" or \"load_der_pkcs7_certificates\" are invoked, triggering the issue during the deserialization of PKCS7 blobs or certificates. The moderate rating is based on the fact that the vulnerability can lead to a segmentation fault, posing a risk of disrupting the normal functioning of any application attempting to deserialize the mentioned certificates. While the impact is significant in terms of service denial and potential system instability, the severity is deemed moderate as it does not directly expose sensitive data or allow for remote code execution, focusing primarily on the localized consequences of a DoS scenario.",
          "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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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2023-49083"
        },
        {
          "category": "external",
          "summary": "RHBZ#2255331",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255331"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-49083",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-49083"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-49083",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-49083"
        },
        {
          "category": "external",
          "summary": "https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a",
          "url": "https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a"
        },
        {
          "category": "external",
          "summary": "https://github.com/pyca/cryptography/pull/9926",
          "url": "https://github.com/pyca/cryptography/pull/9926"
        },
        {
          "category": "external",
          "summary": "https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97",
          "url": "https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97"
        }
      ],
      "release_date": "2023-11-28T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-04-30T10:36:11+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",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2024:2337"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python-cryptography: NULL-dereference when loading PKCS7 certificates"
    }
  ]
}


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