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:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat: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:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
CVSS
Base: 4.4 (as of 28-05-2019 - 19:29)
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.
Access
VectorComplexityAuthentication
LOCAL MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
cvss-vector via4 AV:L/AC:M/Au:N/C:P/I:P/A:P
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.rhba:tst:20150364001
      • comment Red Hat Enterprise Linux 7 Server is installed
        oval oval:com.redhat.rhba:tst:20150364002
      • comment Red Hat Enterprise Linux 7 Workstation is installed
        oval oval:com.redhat.rhba:tst:20150364003
      • comment Red Hat Enterprise Linux 7 ComputeNode is installed
        oval oval:com.redhat.rhba:tst:20150364004
    • 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.rhba:tst:20111656001
      • comment Red Hat Enterprise Linux 6 Server is installed
        oval oval:com.redhat.rhba:tst:20111656002
      • comment Red Hat Enterprise Linux 6 Workstation is installed
        oval oval:com.redhat.rhba:tst:20111656003
      • comment Red Hat Enterprise Linux 6 ComputeNode is installed
        oval oval:com.redhat.rhba:tst:20111656004
    • 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
  • [debian-lts-announce] 20190528 [SECURITY] [DLA 1799-1] linux security update
  • [debian-lts-announce] 20190528 [SECURITY] [DLA 1799-2] linux 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 28-05-2019 - 19:29
Published 11-01-2019 - 14:29
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