csaf_redhat - rhsa-2024

rhsa-2024_3105

Vulnerability from csaf_redhat

Published

2024-05-22 10:07

Modified

2024-12-11 21:59

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 8. 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 8.10 Release Notes linked from the References section.

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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        "name": "NULL Pointer Dereference"
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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.",
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          "text": "python-cryptography: NULL-dereference when loading PKCS7 certificates",
          "title": "Vulnerability summary"
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          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2023-49083"
        },
        {
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          "summary": "RHBZ#2255331",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255331"
        },
        {
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          "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"
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      "release_date": "2023-11-28T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-05-22T10:07:11+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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          "url": "https://access.redhat.com/errata/RHSA-2024:3105"
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          "category": "workaround",
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            "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",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python-cryptography: NULL-dereference when loading PKCS7 certificates"
    }
  ]
}

cve-2023-49083

Vulnerability from cvelistv5

Published

2023-11-29 18:50

Modified

2024-08-02 21:46

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.

References

▼	URL	Tags
	https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97	x_refsource_CONFIRM
	https://github.com/pyca/cryptography/pull/9926	x_refsource_MISC
	https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/

Impacted products

Vendor

Product

Version

▼

pyca

cryptography

Version: >= 3.1, < 41.0.6

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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