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    CVE-2020-15702

    TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.

    Published:Aug 6, 2020
    Last Modified:Nov 3, 2025
    EPS:Aug 6, 2020
    EPSS Score:0.00048
    CVSS Score:7

    Affected Products

    Vendor
    Canonical
    Product
    Apport
    Vendor
    Canonical
    Product
    Ubuntu Linux

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-77113 (CVSS 6.7) — Path traversal in apport-unpack in Canonical Apport before 2.36.0, 2.34.2, and 2.28.4 on Linux allows an attac…
    CVE-2025-5467 (CVSS 1.9) — It was discovered that process_crash() in data/apport in Canonical's Apport crash reporting tool may create cr…
    CVE-2025-5054 (CVSS 4.7) — Race condition in Canonical apport up to and including 2.32.0 allows a local attacker to leak sensitive inform…
    CVE-2020-11936 (CVSS 3.1) — gdbus setgid privilege escalation…
    CVE-2022-28653 (CVSS 7.5) — Users can consume unlimited disk space in /var/crash…
    CVE-2022-1242 (CVSS 7.8) — Apport can be tricked into connecting to arbitrary sockets as the root user…
    CVE-2021-3899 (CVSS 7.8) — There is a race condition in the 'replaced executable' detection that, with the correct local configuration, a…
    CVE-2023-1326 (CVSS 7.7) — A privilege escalation attack was found in apport-cli 2.26.0 and earlier which is similar to CVE-2023-26604. I…
    CVE-2021-3710 (CVSS 6.5) — An information disclosure via path traversal was discovered in apport/hookutils.py function read_file(). This …
    CVE-2021-3709 (CVSS 6.5) — Function check_attachment_for_errors() in file data/general-hooks/ubuntu.py could be tricked into exposing pri…

    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