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    CVE-2019-6133

    In PolicyKit (aka polkit) 0.115, the "start time" protection mechanism can be bypassed because fork() is not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c.

    Published:Jan 9, 2019
    Last Modified:Nov 21, 2024
    EPS:Jan 11, 2019
    EPSS Score:0.00014
    CVSS Score:6.7

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Polkit Project
    Product
    Polkit
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-120 Double Encoding
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-15 Command Delimiters
    CAPEC-182 Flash Injection
    CAPEC-19 Embedding Scripts within Scripts
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-26 Leveraging Race Conditions
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-41 Using Meta-characters in E-mail Headers to Inject Malicious Payloads
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-44 Overflow Binary Resource File
    CAPEC-441 Malicious Logic Insertion
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-478 Modification of Windows Service Configuration
    CAPEC-479 Malicious Root Certificate
    CAPEC-502 Intent Spoof
    CAPEC-503 WebView Exposure
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-536 Data Injected During Configuration
    CAPEC-546 Incomplete Data Deletion in a Multi-Tenant Environment
    CAPEC-550 Install New Service
    CAPEC-551 Modify Existing Service
    CAPEC-552 Install Rootkit
    CAPEC-556 Replace File Extension Handlers
    CAPEC-558 Replace Trusted Executable
    CAPEC-562 Modify Shared File
    CAPEC-563 Add Malicious File to Shared Webroot
    CAPEC-564 Run Software at Logon
    CAPEC-578 Disable Security Software
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities
    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00049.html
    http://www.securityfocus.com/bid/106537
    https://access.redhat.com/errata/RHSA-2019:0230
    https://access.redhat.com/errata/RHSA-2019:0420
    https://access.redhat.com/errata/RHSA-2019:0832
    https://access.redhat.com/errata/RHSA-2019:2699
    https://access.redhat.com/errata/RHSA-2019:2978
    https://bugs.chromium.org/p/project-zero/issues/detail?id=1692
    https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf
    https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76e2f81
    https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19
    https://lists.debian.org/debian-lts-announce/2019/01/msg00021.html
    https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
    https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
    https://support.f5.com/csp/article/K22715344
    https://usn.ubuntu.com/3901-1/
    https://usn.ubuntu.com/3901-2/
    https://usn.ubuntu.com/3903-1/
    https://usn.ubuntu.com/3903-2/
    https://usn.ubuntu.com/3908-1/
    https://usn.ubuntu.com/3908-2/
    https://usn.ubuntu.com/3910-1/
    https://usn.ubuntu.com/3910-2/
    https://usn.ubuntu.com/3934-1/
    https://usn.ubuntu.com/3934-2/
    http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00049.html
    http://www.securityfocus.com/bid/106537
    https://access.redhat.com/errata/RHSA-2019:0230
    https://access.redhat.com/errata/RHSA-2019:0420
    https://access.redhat.com/errata/RHSA-2019:0832
    https://access.redhat.com/errata/RHSA-2019:2699
    https://access.redhat.com/errata/RHSA-2019:2978
    https://bugs.chromium.org/p/project-zero/issues/detail?id=1692
    https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf
    https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76e2f81
    https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19
    https://lists.debian.org/debian-lts-announce/2019/01/msg00021.html
    https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
    https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
    https://support.f5.com/csp/article/K22715344
    https://usn.ubuntu.com/3901-1/
    https://usn.ubuntu.com/3901-2/
    https://usn.ubuntu.com/3903-1/
    https://usn.ubuntu.com/3903-2/
    https://usn.ubuntu.com/3908-1/
    https://usn.ubuntu.com/3908-2/
    https://usn.ubuntu.com/3910-1/
    https://usn.ubuntu.com/3910-2/
    https://usn.ubuntu.com/3934-1/
    https://usn.ubuntu.com/3934-2/

    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