ID CVE-2019-6133
Summary 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.
References
Vulnerable Configurations
  • cpe:2.3:a:polkit_project:polkit:0.115
    cpe:2.3:a:polkit_project:polkit:0.115
  • Debian Linux 8.0 (Jessie)
    cpe:2.3:o:debian:debian_linux:8.0
  • RedHat Enterprise Linux Desktop 7.0
    cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
  • RedHat Enterprise Linux Server 7.0
    cpe:2.3:o:redhat:enterprise_linux_server:7.0
  • Red Hat Enterprise Linux Server Advanced mission critical Update Support (AUS) 7.6
    cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6
  • Red Hat Enterprise Linux Server Extended Update Support (EUS) 7.6
    cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6
  • Red Hat Enterprise Linux Server Telecommunications Update Service (TUS) 7.6
    cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6
  • RedHat Enterprise Linux Workstation 7.0
    cpe:2.3:o:redhat:enterprise_linux_workstation:7.0
  • Red Hat Enterprise Linux Desktop 6.0
    cpe:2.3:o:redhat:enterprise_linux_desktop:6.0
  • Red Hat Enterprise Linux Server 6.0
    cpe:2.3:o:redhat:enterprise_linux_server:6.0
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6
    cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6
  • Red Hat Enterprise Linux Workstation 6.0
    cpe:2.3:o:redhat:enterprise_linux_workstation:6.0
  • Canonical Ubuntu Linux 12.04 ESM (Extended Security Maintenance)
    cpe:2.3:o:canonical:ubuntu_linux:12.04:-:-:-:esm
  • Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)
    cpe:2.3:o:canonical:ubuntu_linux:14.04:-:-:-:lts
  • Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)
    cpe:2.3:o:canonical:ubuntu_linux:16.04:-:-:-:lts
  • Canonical Ubuntu Linux 18.04 LTS Edition
    cpe:2.3:o:canonical:ubuntu_linux:18.04:-:-:-:lts
  • Canonical Ubuntu Linux 18.10
    cpe:2.3:o:canonical:ubuntu_linux:18.10
CVSS
Base: 4.4
Impact:
Exploitability:
CWE CWE-284
CAPEC
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
nessus via4
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-1644.NASL
    description Two vulnerabilities were found in Policykit, a framework for managing administrative policies and privileges : CVE-2018-19788 It was discovered that incorrect processing of very high UIDs in Policykit could result in authentication bypass. CVE-2019-6133 Jann Horn of Google found that Policykit doesn't properly check if a process is already authenticated, which can lead to an authentication reuse by a different user. For Debian 8 'Jessie', these problems have been fixed in version 0.105-15~deb8u4. We recommend that you upgrade your policykit-1 packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2019-02-06
    plugin id 121423
    published 2019-01-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=121423
    title Debian DLA-1644-1 : policykit-1 security update
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2019-0230.NASL
    description From Red Hat Security Advisory 2019:0230 : An update for polkit is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. 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. The polkit packages provide a component for controlling system-wide privileges. This component provides a uniform and organized way for non-privileged processes to communicate with privileged ones. Security Fix(es) : * polkit: Temporary auth hijacking via PID reuse and non-atomic fork (CVE-2019-6133) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Jan Rybar (freedesktop.org) for reporting this issue. Upstream acknowledges Jann Horn (Google Project Zero) as the original reporter.
    last seen 2019-02-21
    modified 2019-02-04
    plugin id 121524
    published 2019-02-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=121524
    title Oracle Linux 7 : polkit (ELSA-2019-0230)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20190131_POLKIT_ON_SL7_X.NASL
    description Security Fix(es) : - polkit: Temporary auth hijacking via PID reuse and non-atomic fork (CVE-2019-6133)
    last seen 2019-02-21
    modified 2019-02-04
    plugin id 121533
    published 2019-02-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=121533
    title Scientific Linux Security Update : polkit on SL7.x x86_64
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2019-0230.NASL
    description An update for polkit is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. 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. The polkit packages provide a component for controlling system-wide privileges. This component provides a uniform and organized way for non-privileged processes to communicate with privileged ones. Security Fix(es) : * polkit: Temporary auth hijacking via PID reuse and non-atomic fork (CVE-2019-6133) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Jan Rybar (freedesktop.org) for reporting this issue. Upstream acknowledges Jann Horn (Google Project Zero) as the original reporter.
    last seen 2019-02-21
    modified 2019-02-04
    plugin id 121528
    published 2019-02-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=121528
    title RHEL 7 : polkit (RHSA-2019:0230)
redhat via4
advisories
  • bugzilla
    id 1664212
    title CVE-2019-6133 polkit: Temporary auth hijacking via PID reuse and non-atomic fork
    oval
    AND
    • OR
      • comment Red Hat Enterprise Linux 7 Client is installed
        oval oval:com.redhat.rhsa:tst:20140675001
      • comment Red Hat Enterprise Linux 7 Server is installed
        oval oval:com.redhat.rhsa:tst:20140675002
      • comment Red Hat Enterprise Linux 7 Workstation is installed
        oval oval:com.redhat.rhsa:tst:20140675003
      • comment Red Hat Enterprise Linux 7 ComputeNode is installed
        oval oval:com.redhat.rhsa:tst:20140675004
    • OR
      • AND
        • comment polkit is earlier than 0:0.112-18.el7_6.1
          oval oval:com.redhat.rhsa:tst:20190230007
        • comment polkit is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455006
      • AND
        • comment polkit-devel is earlier than 0:0.112-18.el7_6.1
          oval oval:com.redhat.rhsa:tst:20190230005
        • comment polkit-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455008
      • AND
        • comment polkit-docs is earlier than 0:0.112-18.el7_6.1
          oval oval:com.redhat.rhsa:tst:20190230009
        • comment polkit-docs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455010
    rhsa
    id RHSA-2019:0230
    released 2019-01-31
    severity Important
    title RHSA-2019:0230: polkit security update (Important)
  • bugzilla
    id 1664212
    title CVE-2019-6133 polkit: Temporary auth hijacking via PID reuse and non-atomic fork
    oval
    AND
    • OR
      • comment Red Hat Enterprise Linux 6 Client is installed
        oval oval:com.redhat.rhsa:tst:20100842001
      • comment Red Hat Enterprise Linux 6 Server is installed
        oval oval:com.redhat.rhsa:tst:20100842002
      • comment Red Hat Enterprise Linux 6 Workstation is installed
        oval oval:com.redhat.rhsa:tst:20100842003
      • comment Red Hat Enterprise Linux 6 ComputeNode is installed
        oval oval:com.redhat.rhsa:tst:20100842004
    • OR
      • AND
        • comment polkit is earlier than 0:0.96-11.el6_10.1
          oval oval:com.redhat.rhsa:tst:20190420009
        • comment polkit is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455006
      • AND
        • comment polkit-desktop-policy is earlier than 0:0.96-11.el6_10.1
          oval oval:com.redhat.rhsa:tst:20190420011
        • comment polkit-desktop-policy is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455012
      • AND
        • comment polkit-devel is earlier than 0:0.96-11.el6_10.1
          oval oval:com.redhat.rhsa:tst:20190420005
        • comment polkit-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455008
      • AND
        • comment polkit-docs is earlier than 0:0.96-11.el6_10.1
          oval oval:com.redhat.rhsa:tst:20190420007
        • comment polkit-docs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110455010
    rhsa
    id RHSA-2019:0420
    released 2019-02-26
    severity Important
    title RHSA-2019:0420: polkit security update (Important)
  • rhsa
    id RHSA-2019:0832
rpms
  • polkit-0:0.112-18.el7_6.1
  • polkit-devel-0:0.112-18.el7_6.1
  • polkit-docs-0:0.112-18.el7_6.1
  • polkit-0:0.96-11.el6_10.1
  • polkit-desktop-policy-0:0.96-11.el6_10.1
  • polkit-devel-0:0.96-11.el6_10.1
  • polkit-docs-0:0.96-11.el6_10.1
refmap via4
bid 106537
confirm https://support.f5.com/csp/article/K22715344
misc
mlist [debian-lts-announce] 20190128 [SECURITY] [DLA 1644-1] policykit-1 security update
ubuntu
  • USN-3901-1
  • USN-3901-2
  • USN-3903-1
  • USN-3903-2
  • USN-3908-1
  • USN-3908-2
  • USN-3910-1
  • USN-3910-2
  • USN-3934-1
Last major update 11-01-2019 - 09:29
Published 11-01-2019 - 09:29
Last modified 10-05-2019 - 13:15
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