UBUNTU-CVE-2023-49083

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    UBUNTU-CVE-2023-49083

    Published: 4 Dec 2023Last Modified: 4 Feb 2026
    Upstream:
    CVE-2023-49083
    Aliases:
    USN-6539-1

    Summary:

    Details: 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: https://ubuntu.com/security/CVE-2023-49083, https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97, http://www.openwall.com/lists/oss-security/2023/11/29/2, https://ubuntu.com/security/notices/USN-6539-1, https://www.cve.org/CVERecord?id=CVE-2023-49083

    Affected packages

    Package

    Name: python-cryptography

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.4.8-1ubuntu2.1

    Affected versions

    3.3.2-1
    3.3.2-1build1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2023-49083 | CVE-DB