Bugzilla – Bug 1132348
VUL-1: CVE-2019-3842: systemd: Spoofing of XDG_SEAT allows for actions to be checked against "allow_active" instead of "allow_any"
Last modified: 2020-07-10 13:34:47 UTC
CVE-2019-3842 systemd has a vulnerability in the PAM module, pam_systemd, that allows for spoofing of the XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather than "allow_any". Users with local access to machines with an active tty sessions can exploit this to elevate their privileges. References: https://bugzilla.redhat.com/show_bug.cgi?id=1668521 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-3842 http://www.debian.org/security/2019/dsa-4428 http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-3842.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3842 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STR36RJE4ZZIORMDXRERVBHMPRNRTHAC/
I'll backport https://github.com/systemd/systemd/commit/83d4ab55336ff8a0643c6aa627b31e351a24040a to all supported distros.
So the fix has been backported to all supported distros and will be part of the next respective MUs. Hence re-assigning to the security team.
SUSE-SU-2019:1265-1: An update that solves three vulnerabilities and has 8 fixes is now available. Category: security (important) Bug References: 1080919,1121563,1125352,1126056,1127557,1128657,1130230,1132348,1132400,1132721,955942 CVE References: CVE-2018-6954,CVE-2019-3842,CVE-2019-6454 Sources used: SUSE OpenStack Cloud 7 (src): systemd-228-150.66.4 SUSE Linux Enterprise Software Development Kit 12-SP4 (src): systemd-228-150.66.4 SUSE Linux Enterprise Software Development Kit 12-SP3 (src): systemd-228-150.66.4 SUSE Linux Enterprise Server for SAP 12-SP2 (src): systemd-228-150.66.4 SUSE Linux Enterprise Server 12-SP4 (src): systemd-228-150.66.4 SUSE Linux Enterprise Server 12-SP3 (src): systemd-228-150.66.4 SUSE Linux Enterprise Server 12-SP2-LTSS (src): systemd-228-150.66.4 SUSE Linux Enterprise Server 12-SP2-BCL (src): systemd-228-150.66.4 SUSE Linux Enterprise Desktop 12-SP4 (src): systemd-228-150.66.4 SUSE Linux Enterprise Desktop 12-SP3 (src): systemd-228-150.66.4 SUSE Enterprise Storage 4 (src): systemd-228-150.66.4 SUSE CaaS Platform ALL (src): systemd-228-150.66.4 SUSE CaaS Platform 3.0 (src): systemd-228-150.66.4 OpenStack Cloud Magnum Orchestration 7 (src): systemd-228-150.66.4 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
openSUSE-SU-2019:1450-1: An update that solves three vulnerabilities and has 8 fixes is now available. Category: security (important) Bug References: 1080919,1121563,1125352,1126056,1127557,1128657,1130230,1132348,1132400,1132721,955942 CVE References: CVE-2018-6954,CVE-2019-3842,CVE-2019-6454 Sources used: openSUSE Leap 42.3 (src): systemd-228-71.1, systemd-mini-228-71.1
SUSE-SU-2019:1364-1: An update that solves four vulnerabilities and has 9 fixes is now available. Category: security (moderate) Bug References: 1036463,1121563,1124122,1125352,1125604,1126056,1127557,1130230,1132348,1132400,1132721,1133506,1133509 CVE References: CVE-2019-3842,CVE-2019-3843,CVE-2019-3844,CVE-2019-6454 Sources used: SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 (src): systemd-234-24.30.1, systemd-mini-234-24.30.1 SUSE Linux Enterprise Module for Basesystem 15 (src): systemd-234-24.30.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
SUSE-SU-2019:1364-2: An update that solves four vulnerabilities and has 9 fixes is now available. Category: security (moderate) Bug References: 1036463,1121563,1124122,1125352,1125604,1126056,1127557,1130230,1132348,1132400,1132721,1133506,1133509 CVE References: CVE-2019-3842,CVE-2019-3843,CVE-2019-3844,CVE-2019-6454 Sources used: SUSE Linux Enterprise Module for Open Buildservice Development Tools 15-SP1 (src): systemd-234-24.30.1, systemd-mini-234-24.30.1 SUSE Linux Enterprise Module for Basesystem 15-SP1 (src): systemd-234-24.30.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Done