CVE-2018-15686

A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.

These are all security issues fixed in the libsystemd0-249.4-2.2 package on the GA media of openSUSE Tumbleweed.

This update for systemd fixes the following issues:

Security issues fixed:

• CVE-2018-15688: A buffer overflow vulnerability in the dhcp6 client of systemd allowed a malicious dhcp6 server to overwrite heap memory in systemd-networkd. (bsc#1113632)
• CVE-2018-15686: A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. (bsc#1113665)

Non security issues fixed:

• dhcp6: split assert_return() to be more debuggable when hit
• core: skip unit deserialization and move to the next one when unit_deserialize() fails
• core: properly handle deserialization of unknown unit types (#6476)
• core: don't create Requires for workdir if 'missing ok' (bsc#1113083)
• logind: use manager_get_user_by_pid() where appropriate
• logind: rework manager_get_{user|session}_by_pid() a bit
• login: fix [email protected] case, so we don't allow nested sessions (#8051) (bsc#1112024)
• core: be more defensive if we can't determine per-connection socket peer (#7329)
• core: introduce systemd.early_core_pattern= kernel cmdline option
• core: add missing 'continue' statement
• core/mount: fstype may be NULL
• journald: don't ship systemd-journald-audit.socket (bsc#1109252)
• core: make 'tmpfs' dependencies on swapfs a 'default' dep, not an 'implicit' (bsc#1110445)
• mount: make sure we unmount tmpfs mounts before we deactivate swaps (#7076)
• detect-virt: do not try to read all of /proc/cpuinfo (bsc#1109197)
• emergency: make sure console password agents don't interfere with the emergency shell
• man: document that 'nofail' also has an effect on ordering
• journald: take leading spaces into account in syslog_parse_identifier
• journal: do not remove multiple spaces after identifier in syslog message
• syslog: fix segfault in syslog_parse_priority()
• journal: fix syslog_parse_identifier()
• install: drop left-over debug message (#6913)
• Ship systemd-sysv-install helper via the main package This script was part of systemd-sysvinit sub-package but it was wrong since systemd-sysv-install is a script used to redirect enable/disable operations to chkconfig when the unit targets are sysv init scripts. Therefore it's never been a SySV init tool.
• Add udev.no-partlabel-links kernel command-line option. This option can be used to disable the generation of the by-partlabel symlinks regardless of the name used. (bsc#1089761)
• man: SystemMaxUse= clarification in journald.conf(5). (bsc#1101040)
• systemctl: load unit if needed in 'systemctl is-active' (bsc#1102908)
• core: don't freeze OnCalendar= timer units when the clock goes back a lot (bsc#1090944)
• Enable or disable machines.target according to the presets (bsc#1107941)
• cryptsetup: add support for sector-size= option (fate#325697)
• nspawn: always use permission mode 555 for /sys (bsc#1107640)
• Bugfix for a race condition between daemon-reload and other commands (bsc#1105031)
• Fixes an issue where login with root credentials was not possible in init level 5 (bsc#1091677)
• Fix an issue where services of type 'notify' harmless DENIED log entries. (bsc#991901)
• Does no longer adjust qgroups on existing subvolumes (bsc#1093753)
• cryptsetup: add support for sector-size= option (#9936) (fate#325697 bsc#1114135)

This update for systemd fixes the following issues:

Security issues fixed:

• CVE-2018-15688: A buffer overflow vulnerability in the dhcp6 client of systemd allowed a malicious dhcp6 server to overwrite heap memory in systemd-networkd. (bsc#1113632)
• CVE-2018-15686: A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. (bsc#1113665)

Non-security issues fixed:

• dhcp6: split assert_return() to be more debuggable when hit

• core: skip unit deserialization and move to the next one when unit_deserialize() fails

• core: properly handle deserialization of unknown unit types (#6476)

• core: don't create Requires for workdir if 'missing ok' (bsc#1113083)

• logind: use manager_get_user_by_pid() where appropriate

• logind: rework manager_get_{user|session}_by_pid() a bit

• login: fix [email protected] case, so we don't allow nested sessions (#8051) (bsc#1112024)

• core: be more defensive if we can't determine per-connection socket peer (#7329)

• socket-util: introduce port argument in sockaddr_port()

• service: fixup ExecStop for socket-activated shutdown (#4120)

• service: Continue shutdown on socket activated unit on termination (#4108) (bsc#1106923)

• cryptsetup: build fixes for 'add support for sector-size= option'

• udev-rules: IMPORT cmdline does not recognize keys with similar names (bsc#1111278)

• core: keep the kernel coredump defaults when systemd-coredump is disabled

• core: shorten main() a bit, split out coredump initialization

• core: set RLIMIT_CORE to unlimited by default (bsc#1108835)

• core/mount: fstype may be NULL

• journald: don't ship systemd-journald-audit.socket (bsc#1109252)

• core: make 'tmpfs' dependencies on swapfs a 'default' dep, not an 'implicit' (bsc#1110445)

• mount: make sure we unmount tmpfs mounts before we deactivate swaps (#7076)

• tmp.mount.hm4: After swap.target (#3087)

• Ship systemd-sysv-install helper via the main package This script was part of systemd-sysvinit sub-package but it was wrong since systemd-sysv-install is a script used to redirect enable/disable operations to chkconfig when the unit targets are sysv init scripts. Therefore it's never been a SySV init tool.

This update for systemd fixes the following issues:

Security issues fixed:

• CVE-2018-15688: A buffer overflow vulnerability in the dhcp6 client of systemd allowed a malicious dhcp6 server to overwrite heap memory in systemd-networkd. (bsc#1113632)
• CVE-2018-15686: A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. (bsc#1113665)

Non-security issues fixed:

• dhcp6: split assert_return() to be more debuggable when hit

• core: skip unit deserialization and move to the next one when unit_deserialize() fails

• core: properly handle deserialization of unknown unit types (#6476)

• core: don't create Requires for workdir if 'missing ok' (bsc#1113083)

• logind: use manager_get_user_by_pid() where appropriate

• logind: rework manager_get_{user|session}_by_pid() a bit

• login: fix [email protected] case, so we don't allow nested sessions (#8051) (bsc#1112024)

• core: be more defensive if we can't determine per-connection socket peer (#7329)

• socket-util: introduce port argument in sockaddr_port()

• service: fixup ExecStop for socket-activated shutdown (#4120)

• service: Continue shutdown on socket activated unit on termination (#4108) (bsc#1106923)

• cryptsetup: build fixes for 'add support for sector-size= option'

• udev-rules: IMPORT cmdline does not recognize keys with similar names (bsc#1111278)

• core: keep the kernel coredump defaults when systemd-coredump is disabled

• core: shorten main() a bit, split out coredump initialization

• core: set RLIMIT_CORE to unlimited by default (bsc#1108835)

• core/mount: fstype may be NULL

• journald: don't ship systemd-journald-audit.socket (bsc#1109252)

• core: make 'tmpfs' dependencies on swapfs a 'default' dep, not an 'implicit' (bsc#1110445)

• mount: make sure we unmount tmpfs mounts before we deactivate swaps (#7076)

• tmp.mount.hm4: After swap.target (#3087)

• Ship systemd-sysv-install helper via the main package This script was part of systemd-sysvinit sub-package but it was wrong since systemd-sysv-install is a script used to redirect enable/disable operations to chkconfig when the unit targets are sysv init scripts. Therefore it's never been a SySV init tool.

This update for systemd fixes the following issues:

• Fix security vulnerabilities CVE-2018-16864 and CVE-2018-16865 (bsc#1120323): Both issues were memory corruptions via attacker-controlled alloca which could have been used to gain root privileges by a local attacker.

• Fix security vulnerability CVE-2018-15686 (bsc#1113665): A vulnerability in unit_deserialize of systemd used to allow an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This could have been used to improperly influence systemd execution and possibly lead to root privilege escalation.

• Remedy 2048 character line-length limit in systemd-sysctl code that would cause parser failures if /etc/sysctl.conf contained lines that exceeded this length (bsc#1071558).

• Fix a bug in systemd's core timer code that would cause timer looping under certain conditions, resulting in hundreds of syslog messages being written to the journal (bsc#1068588).

This update for systemd fixes the following issues:

• Fix security vulnerabilities CVE-2018-16864 and CVE-2018-16865 (bsc#1120323): Both issues were memory corruptions via attacker-controlled alloca which could have been used to gain root privileges by a local attacker.

• Fix security vulnerability CVE-2018-15686 (bsc#1113665): A vulnerability in unit_deserialize of systemd used to allow an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This could have been used to improperly influence systemd execution and possibly lead to root privilege escalation.

• Remedy 2048 character line-length limit in systemd-sysctl code that would cause parser failures if /etc/sysctl.conf contained lines that exceeded this length (bsc#1071558).

• Fix a bug in systemd's core timer code that would cause timer looping under certain conditions, resulting in hundreds of syslog messages being written to the journal (bsc#1068588).

This update for systemd fixes the following issues:

• Fix security vulnerabilities CVE-2018-16864 and CVE-2018-16865 (bsc#1120323): Both issues were memory corruptions via attacker-controlled alloca which could have been used to gain root privileges by a local attacker.

• Fix security vulnerability CVE-2018-15686 (bsc#1113665): A vulnerability in unit_deserialize of systemd used to allow an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This could have been used to improperly influence systemd execution and possibly lead to root privilege escalation.

• Remedy 2048 character line-length limit in systemd-sysctl code that would cause parser failures if /etc/sysctl.conf contained lines that exceeded this length (bsc#1071558).

• Fix a bug in systemd's core timer code that would cause timer looping under certain conditions, resulting in hundreds of syslog messages being written to the journal (bsc#1068588).

Jann Horn discovered that unit_deserialize incorrectly handled status messages above a certain length. A local attacker could potentially exploit this via NotifyAccess to inject arbitrary state across re-execution and obtain root privileges. (CVE-2018-15686)

Jann Horn discovered a race condition in chown_one(). A local attacker could potentially exploit this by setting arbitrary permissions on certain files to obtain root privileges. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-15687)

It was discovered that systemd-tmpfiles mishandled symlinks in non-terminal path components. A local attacker could potentially exploit this by gaining ownership of certain files to obtain root privileges. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-6954)