Systemd Project Systemd vulnerabilities

CVE-2023-50387 [HIGH] CVE-2023-50387: Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the

CVE-2023-50868 [HIGH] CVE-2023-50868: The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of ser The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that a

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-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-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.

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-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-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-2019-3842 [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-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-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-2017-15908 [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-2018-21029 [CRITICAL] CWE-295 CVE-2018-21029: systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Ov systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issu

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-2018-16865 [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-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-2023-26604 [HIGH] CWE-269 CVE-2023-26604: systemd before 247 does not adequately block local privilege escalation for some Sudo configurations systemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible sudoers files in which the "systemctl status" command may be executed. Specifically, systemd does not set LESSSECURE to 1, and thus other programs may be launched from the less program. This presents a substantial security risk when ru

CVE-2013-4391 [HIGH] CWE-190 CVE-2013-4391: Integer overflow in the valid_user_field function in journal/journald-native.c in systemd allows rem Integer overflow in the valid_user_field function in journal/journald-native.c in systemd allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large journal data field, which triggers a heap-based buffer overflow.

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.