{"id":"CVE-2020-1712","aliases":["DEBIAN-CVE-2020-1712","DLA-3063-1","EUVD-2020-12567","GHSA-wggx-8wf7-vg3g","MGASA-2020-0094","RHSA-2020:0564","RHSA-2020:0575","SUSE-RU-2020:0793-1","SUSE-SU-2020:0331-1","SUSE-SU-2020:0335-1","SUSE-SU-2020:0353-1","UBUNTU-CVE-2020-1712","USN-4269-1","openSUSE-SU-2020:0208-1","openSUSE-SU-2024:11420-1"],"status":"published","title":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where...","description":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. 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messages.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00456,"percentile":0.39822,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-416"],"published":"2020-02-05T09:00:00Z","modified":"2026-10-26T12:02:28Z","exploits":[{"source":"pocgithub","id":"davidajagbe/Vulnerability-assessment","title":"davidajagbe/Vulnerability-assessment","date":"2026-10-21","url":"https://github.com/davidajagbe/Vulnerability-assessment"}],"fixes":[{"ecosystem":"Debian:12","package":"systemd","fixed_in":["244.2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"systemd","fixed_in":["244.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"systemd","fixed_in":["244.2-1"],"sources":["osv"]},{"ecosystem":"Debian:9","package":"systemd","fixed_in":["232-25+deb9u14"],"sources":["osv"]},{"ecosystem":"Red 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heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.","status":"published","published":"2020-03-31T16:44:29Z","modified":"2026-10-14T08:02:08.054Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:35:56.213477Z"}],"euvd":[{"id":"EUVD-2020-12567","description":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.","status":"published","published":"2020-03-31T16:44:29Z","modified":"2026-10-14T08:02:08Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:27:17.374818Z"}],"ghsa":[{"id":"GHSA-wggx-8wf7-vg3g","title":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where...","description":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. 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A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.","status":"published","published":"2020-03-31T17:15:26.577Z","modified":"2026-10-24T14:06:22.218922296Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:14.828228Z"},{"id":"DEBIAN-CVE-2020-1712","description":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.","status":"published","published":"2020-03-31T17:15:26.577Z","modified":"2026-10-26T12:02:28.421134072Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"RHSA-2020:0564","title":"Red Hat Security Advisory: systemd security update","status":"published","published":"2024-09-16T03:29:58Z","modified":"2026-10-15T10:01:27Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"RHSA-2020:0575","title":"Red Hat Security Advisory: systemd security and bug fix update","status":"published","published":"2024-09-16T03:30:06Z","modified":"2026-10-15T10:01:27Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"UBUNTU-CVE-2020-1712","description":"A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.","status":"published","published":"2020-02-05T09:00:00Z","modified":"2026-04-22T12:31:53.419327Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:23.344108Z"},{"id":"DLA-3063-1","title":"systemd - security update","status":"published","published":"2022-06-30T00:00:00Z","modified":"2026-03-09T01:18:45.140618Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"MGASA-2020-0094","title":"Updated systemd packages fix security vulnerabilities","description":"Updated systemd packages fix security vulnerabilities:\n\nIt was discovered that systemd incorrectly handled certain udevadm trigger\ncommands. A local attacker could possibly use this issue to cause systemd\nto consume resources, leading to a denial of service (CVE-2019-20386).\n\nTavis Ormandy discovered that systemd incorrectly handled certain Polkit\nqueries. A local attacker could use this issue to cause systemd to crash,\nresulting in a denial of service, or possibly execute arbitrary code and\nescalate privileges (CVE-2020-1712).\n","status":"published","published":"2020-02-21T23:06:01Z","modified":"2026-04-16T04:42:05.952650737Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2020:0208-1","title":"Security update for systemd","description":"This update for systemd fixes the following issues:\n\n- CVE-2020-1712 (bsc#bsc#1162108)\n  Fix a heap use-after-free vulnerability, when asynchronous\n  Polkit queries were performed while handling Dbus messages. A local\n  unprivileged attacker could have abused this flaw to crash systemd services or\n  potentially execute code and elevate their privileges, by sending specially\n  crafted Dbus messages.\n\n- Use suse.pool.ntp.org server pool on SLE distros (jsc#SLE-7683)\n\n- libblkid: open device in nonblock mode. (bsc#1084671)\n- udev/cdrom_id: Do not open CD-rom in exclusive mode. (bsc#1154256)\n- bus_open leak sd_event_source when udevadm trigger。 (bsc#1161436 CVE-2019-20386)\n- fileio: introduce read_full_virtual_file() for reading virtual files in sysfs, procfs (bsc#1133495 bsc#1159814)\n- fileio: initialize errno to zero before we do fread()\n- fileio: try to read one byte too much in read_full_stream()\n- logind: consider 'greeter' sessions suitable as 'display' sessions of a user (bsc#1158485)\n- logind: never elect a session that is stopping as display\n\n- journal: include kmsg lines from the systemd process which exec()d us (#8078)\n- udevd: don't use monitor after manager_exit()\n- udevd: capitalize log messages in on_sigchld()\n- udevd: merge conditions to decrease indentation\n- Revert 'udevd: fix crash when workers time out after exit is signal caught'\n- core: fragments of masked units ought not be considered for NeedDaemonReload (#7060) (bsc#1156482)\n- udevd: fix crash when workers time out after exit is signal caught\n- udevd: wait for workers to finish when exiting (bsc#1106383)\n\n- Improve bash completion support (bsc#1155207)\n  * shell-completion: systemctl: do not list template units in {re,}start\n  * shell-completion: systemctl: pass current word to all list_unit*\n  * bash-completion: systemctl: pass current partial unit to list-unit* (bsc#1155207)\n  * bash-completion: systemctl: use systemctl --no-pager\n  * bash-completion: also suggest template unit files\n  * bash-completion: systemctl: add missing options and verbs\n  * bash-completion: use the first argument instead of the global variable (#6457)\n\n- networkd: VXLan Make group and remote variable separate (bsc#1156213)\n- networkd: vxlan require Remote= to be a non multicast address (#8117) (bsc#1156213)\n- fs-util: let's avoid unnecessary strerror()\n- fs-util: introduce inotify_add_watch_and_warn() helper\n- ask-password: improve log message when inotify limit is reached (bsc#1155574)\n- shared/install: failing with -ELOOP can be due to the use of an alias in install_error() (bsc#1151377)\n- man: alias names can't be used with enable command (bsc#1151377)\n\n- Add boot option to not use swap at system start (jsc#SLE-7689)\n\n- Allow YaST to select Iranian (Persian, Farsi) keyboard layout\n  (bsc#1092920)\n  \nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2020-02-11T19:12:44Z","modified":"2026-02-04T04:29:12.048436Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2024:11420-1","title":"libsystemd0-249.4-2.2 on GA media","description":"These are all security issues fixed in the libsystemd0-249.4-2.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:45:22.858405Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"SUSE-RU-2020:0793-1","title":"Recommended update for systemd","description":"This update for systemd fixes the following issues:\n\n- manager: fix job mode when signalled to shutdown etc (bsc#1161262)\n- remove fallback for user/exit.target\n- dbus method Manager.Exit() does not start exit.target\n- do not install rescue.target for alt-↑\n- %j/%J unit specifiers\n\n\nAdded support for I/O scheduler selection with blk-mq (bsc#1165579, bsc#1164717).\n\nAdded the udev 60-ssd-scheduler.rules:\n\n- This rules file which select the default IO scheduler for SSDs is\n  being moved out from the git repo since this is not related to\n  systemd or udev at all and is maintained by the kernel team.\n\n- core: coldplug possible nop_job (bsc#1139459)\n- Revert 'udev: use 'deadline' IO scheduler for SSD disks'\n- Fix typo in function name\n- polkit: when authorizing via PK let's re-resolve callback/userdata instead of caching it (bsc#1162108 CVE-2020-1712)\n- sd-bus: introduce API for re-enqueuing incoming messages\n- polkit: on async pk requests, re-validate action/details\n","status":"published","published":"2020-03-25T14:16:04Z","modified":"2026-02-04T04:06:29.196251Z","updated_at":"2026-11-02T15:53:41.276824Z"},{"id":"SUSE-SU-2020:0331-1","title":"Security update for systemd","description":"This update for systemd fixes the following issues:\n\n- CVE-2020-1712 (bsc#bsc#1162108)\n  Fix a heap use-after-free vulnerability, when asynchronous\n  Polkit queries were performed while handling Dbus messages. A local\n  unprivileged attacker could have abused this flaw to crash systemd services or\n  potentially execute code and elevate their privileges, by sending specially\n  crafted Dbus messages.\n\n- Unconfirmed fix for prevent hanging of systemctl during restart. (bsc#1139459)\n- Fix warnings thrown during package installation. (bsc#1154043)\n- Fix for system-udevd prevent crash within OES2018. (bsc#1151506)\n- Fragments of masked units ought not be considered for 'NeedDaemonReload'. (bsc#1156482)\n- Wait for workers to finish when exiting. (bsc#1106383)\n- Improve log message when inotify limit is reached. (bsc#1155574)\n- Mention in the man pages that alias names are only effective after command 'systemctl enable'. (bsc#1151377)\n- Introduce function for reading virtual files in 'sysfs' and 'procfs'. (bsc#1133495, bsc#1159814)\n","status":"published","published":"2020-03-18T11:53:17Z","modified":"2026-02-04T04:13:57.33746Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0335-1","title":"Security update for systemd","description":"This update for systemd fixes the following issues:\n\n- CVE-2020-1712 (bsc#bsc#1162108)\n  Fix a heap use-after-free vulnerability, when asynchronous\n  Polkit queries were performed while handling Dbus messages. A local\n  unprivileged attacker could have abused this flaw to crash systemd services or\n  potentially execute code and elevate their privileges, by sending specially\n  crafted Dbus messages.\n\n- Use suse.pool.ntp.org server pool on SLE distros (jsc#SLE-7683)\n\n- libblkid: open device in nonblock mode. (bsc#1084671)\n- udev/cdrom_id: Do not open CD-rom in exclusive mode. (bsc#1154256)\n- bus_open leak sd_event_source when udevadm trigger。 (bsc#1161436 CVE-2019-20386)\n- fileio: introduce read_full_virtual_file() for reading virtual files in sysfs, procfs (bsc#1133495 bsc#1159814)\n- fileio: initialize errno to zero before we do fread()\n- fileio: try to read one byte too much in read_full_stream()\n- logind: consider 'greeter' sessions suitable as 'display' sessions of a user (bsc#1158485)\n- logind: never elect a session that is stopping as display\n\n- journal: include kmsg lines from the systemd process which exec()d us (#8078)\n- udevd: don't use monitor after manager_exit()\n- udevd: capitalize log messages in on_sigchld()\n- udevd: merge conditions to decrease indentation\n- Revert 'udevd: fix crash when workers time out after exit is signal caught'\n- core: fragments of masked units ought not be considered for NeedDaemonReload (#7060) (bsc#1156482)\n- udevd: fix crash when workers time out after exit is signal caught\n- udevd: wait for workers to finish when exiting (bsc#1106383)\n\n- Improve bash completion support (bsc#1155207)\n  * shell-completion: systemctl: do not list template units in {re,}start\n  * shell-completion: systemctl: pass current word to all list_unit*\n  * bash-completion: systemctl: pass current partial unit to list-unit* (bsc#1155207)\n  * bash-completion: systemctl: use systemctl --no-pager\n  * bash-completion: also suggest template unit files\n  * bash-completion: systemctl: add missing options and verbs\n  * bash-completion: use the first argument instead of the global variable (#6457)\n\n- networkd: VXLan Make group and remote variable separate (bsc#1156213)\n- networkd: vxlan require Remote= to be a non multicast address (#8117) (bsc#1156213)\n- fs-util: let's avoid unnecessary strerror()\n- fs-util: introduce inotify_add_watch_and_warn() helper\n- ask-password: improve log message when inotify limit is reached (bsc#1155574)\n- shared/install: failing with -ELOOP can be due to the use of an alias in install_error() (bsc#1151377)\n- man: alias names can't be used with enable command (bsc#1151377)\n\n- Add boot option to not use swap at system start (jsc#SLE-7689)\n\n- Allow YaST to select Iranian (Persian, Farsi) keyboard layout\n  (bsc#1092920)\n  ","status":"published","published":"2020-02-06T10:37:45Z","modified":"2026-02-04T04:21:59.763475Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0353-1","title":"Security update for systemd","description":"This update for systemd provides the following fixes:\n\n- CVE-2020-1712 (bsc#bsc#1162108)\n  Fix a heap use-after-free vulnerability, when asynchronous\n  Polkit queries were performed while handling Dbus messages. A local\n  unprivileged attacker could have abused this flaw to crash systemd services or\n  potentially execute code and elevate their privileges, by sending specially\n  crafted Dbus messages.\n- sd-bus: Deal with cookie overruns. (bsc#1150595)\n- rules: Add by-id symlinks for persistent memory. (bsc#1140631)\n- Drop the old fds used for logging and reopen them in the sub process before doing any\n  new logging. (bsc#1154948)\n- Fix warnings thrown during package installation (bsc#1154043)\n- Fix for systemctl hanging by restart. (bsc#1139459)\n- man: mention that alias names are only effective after 'systemctl enable'. (bsc#1151377)\n- ask-password: improve log message when inotify limit is reached. (bsc#1155574)\n- udevd: wait for workers to finish when exiting. (bsc#1106383)\n- core: fragments of masked units ought not be considered for NeedDaemonReload. (bsc#1156482)\n- udev: fix 'NULL' deref when executing rules. (bsc#1151506)\n- Introduce function for reading virtual files in 'sysfs' and 'procfs'. (bsc#1133495, bsc#1159814)\n","status":"published","published":"2020-02-06T16:34:47Z","modified":"2026-02-04T02:27:39.544384Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"USN-4269-1","title":"systemd vulnerabilities","description":"It was discovered that systemd incorrectly handled certain PIDFile files.\nA local attacker could possibly use this issue to trick systemd into\nkilling privileged processes. This issue only affected Ubuntu 16.04 LTS.\n(CVE-2018-16888)\n\nIt was discovered that systemd incorrectly handled certain udevadm trigger\ncommands. A local attacker could possibly use this issue to cause systemd\nto consume resources, leading to a denial of service. (CVE-2019-20386)\n\nJann Horn discovered that systemd incorrectly handled services that use the\nDynamicUser property. A local attacker could possibly use this issue to\naccess resources owned by a different service in the future. This issue\nonly affected Ubuntu 18.04 LTS. (CVE-2019-3843, CVE-2019-3844)\n\nTavis Ormandy discovered that systemd incorrectly handled certain Polkit\nqueries. A local attacker could use this issue to cause systemd to crash,\nresulting in a denial of service, or possibly execute arbitrary code and\nescalate privileges. (CVE-2020-1712)\n","status":"published","published":"2020-02-05T16:39:46Z","modified":"2026-04-27T15:48:47.521873468Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}