Systemd Project Systemd vulnerabilities

CVE-2019-3843 [HIGH] CWE-266 CVE-2019-3843: It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binar It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recy

CVE-2019-3844 [HIGH] CWE-268 CVE-2019-3844: It was discovered that a systemd service that uses DynamicUser property can get new privileges throu It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the futur

CVE-2019-3842 [HIGH] CWE-285 CVE-2019-3842: In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the enviro In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather tha

CVE-2019-6454 [MEDIUM] CWE-787 CVE-2019-6454: An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-obje An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the sta

CVE-2018-16888 [MEDIUM] CWE-250 CVE-2018-16888: It was discovered systemd does not correctly check the content of PIDFile files before using it to k It was discovered systemd does not correctly check the content of PIDFile files before using it to kill processes. When a service is run from an unprivileged user (e.g. User field set in the service file), a local attacker who is able to write to the PIDFile of the mentioned service may use this flaw to trick systemd into killing other services and/

CVE-2018-16865 [HIGH] CWE-770 CVE-2018-16865: An allocation of memory without limits, that could result in the stack clashing with another memory An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges. Versio

CVE-2018-16864 [HIGH] CWE-770 CVE-2018-16864: An allocation of memory without limits, that could result in the stack clashing with another memory An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when a program with long command line arguments calls syslog. A local attacker may use this flaw to crash systemd-journald or escalate his privileges. Versions through v240 are vulnerable.

CVE-2018-16866 [LOW] CWE-125 CVE-2018-16866: An out of bounds read was discovered in systemd-journald in the way it parses log messages that term An out of bounds read was discovered in systemd-journald in the way it parses log messages that terminate with a colon ':'. A local attacker can use this flaw to disclose process memory data. Versions from v221 to v239 are vulnerable.

CVE-2018-15688 [HIGH] CWE-120 CVE-2018-15688: A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to ov A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239.

CVE-2018-15686 [HIGH] CWE-502 CVE-2018-15686: A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across s 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.

CVE-2018-15687 [HIGH] CWE-362 CVE-2018-15687: A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary perm A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239.

CVE-2018-1049 [MEDIUM] CWE-362 CVE-2018-1049: In systemd prior to 234 a race condition exists between .mount and .automount units such that automo In systemd prior to 234 a race condition exists between .mount and .automount units such that automount requests from kernel may not be serviced by systemd resulting in kernel holding the mountpoint and any processes that try to use said mount will hang. A race condition like this may lead to denial of service, until mount points are unmounted.

CVE-2018-6954 [HIGH] CWE-59 CVE-2018-6954: systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which allows local users to obtain ownership of arbitrary files via vectors involving creation of a directory and a file under that directory, and later replacing that directory with a symlink. This occurs even if the fs.protected_symlinks sysctl is turne

CVE-2017-18078 [HIGH] CWE-59 CVE-2017-18078: systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinke systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership

CVE-2017-15908 [HIGH] CWE-835 CVE-2017-15908: In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in the dns_packet_read_type_window() function of the 'systemd-resolved' service and cause a DoS of the affected service.

CVE-2015-7510 [CRITICAL] CWE-119 CVE-2015-7510: Stack-based buffer overflow in the getpwnam and getgrnam functions of the NSS module nss-mymachines Stack-based buffer overflow in the getpwnam and getgrnam functions of the NSS module nss-mymachines in systemd.

CVE-2017-1000082 [CRITICAL] CWE-269 CVE-2017-1000082: systemd v233 and earlier fails to safely parse usernames starting with a numeric digit (e.g. "0day") systemd v233 and earlier fails to safely parse usernames starting with a numeric digit (e.g. "0day"), running the service in question with root privileges rather than the user intended.

CVE-2017-9445 [HIGH] CWE-787 CVE-2017-9445: In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to a In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.

CVE-2017-9217 [HIGH] CWE-476 CVE-2017-9217: systemd-resolved through 233 allows remote attackers to cause a denial of service (daemon crash) via systemd-resolved through 233 allows remote attackers to cause a denial of service (daemon crash) via a crafted DNS response with an empty question section.

CVE-2016-10156 [HIGH] CWE-264 CVE-2016-10156: A flaw in systemd v228 in /src/basic/fs-util.c caused world writable suid files to be created when u A flaw in systemd v228 in /src/basic/fs-util.c caused world writable suid files to be created when using the systemd timers features, allowing local attackers to escalate their privileges to root. This is fixed in v229.