CVE-2017-15908

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.

Updated systemd packages fix security vulnerability:

Karim Hossen & Thomas Imbert and Nelson William Gamazo Sanchez independently discovered that systemd-resolved incorrectly handled certain DNS responses. A remote attacker could possibly use this issue to cause systemd to temporarily stop responding, resulting in a denial of service (CVE-2017-15908).

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 several issues.

This security issue was fixed:

• CVE-2018-1049: Prevent race that can lead to DoS when using automounts (bsc#1076308).

These non-security issues were fixed:

• core: don't choke if a unit another unit triggers vanishes during reload
• delta: don't ignore PREFIX when the given argument is PREFIX/SUFFIX
• delta: extend skip logic to work on full directory paths (prefix+suffix) (bsc#1070428)
• delta: check if a prefix needs to be skipped only once
• delta: skip symlink paths when split-usr is enabled (#4591)
• sysctl: use raw file descriptor in sysctl_write (#7753)
• sd-netlink: don't take possesion of netlink fd from caller on failure (bsc#1074254)
• Fix the regexp used to detect broken by-id symlinks in /etc/crypttab It was missing the following case: '/dev/disk/by-id/cr_-xxx'.
• sysctl: disable buffer while writing to /proc (bsc#1071558)
• Use read_line() and LONG_LINE_MAX to read values configuration files. (bsc#1071558)
• sysctl: no need to check for eof twice
• def: add new constant LONG_LINE_MAX
• fileio: add new helper call read_line() as bounded getline() replacement
• service: Don't stop unneeded units needed by restarted service (#7526) (bsc#1066156)
• gpt-auto-generator: fix the handling of the value returned by fstab_has_fstype() in add_swap() (#6280)
• gpt-auto-generator: disable gpt auto logic for swaps if at least one is defined in fstab (bsc#897422)
• fstab-util: introduce fstab_has_fstype() helper
• fstab-generator: ignore root=/dev/nfs (#3591)
• fstab-generator: don't process root= if it happens to be 'gpt-auto' (#3452)
• virt: use XENFEAT_dom0 to detect the hardware domain (#6442, #6662) (#7581) (bsc#1048510)
• analyze: replace --no-man with --man=no in the man page (bsc#1068251)
• udev: net_setup_link: don't error out when we couldn't apply link config (#7328)
• Add missing /etc/systemd/network directory
• Fix parsing of features in detect_vm_xen_dom0 (#7890) (bsc#1048510)
• sd-bus: use -- when passing arguments to ssh (#6706)
• systemctl: make sure we terminate the bus connection first, and then close the pager (#3550)
• sd-bus: bump message queue size (bsc#1075724)
• tmpfiles: downgrade warning about duplicate line

Karim Hossen & Thomas Imbert and Nelson William Gamazo Sanchez independently discovered that systemd-resolved incorrectly handled certain DNS responses. A remote attacker could possibly use this issue to cause systemd to temporarily stop responding, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-15908)

It was discovered that systemd incorrectly handled automounted volumes. A local attacker could possibly use this issue to cause applications to hang, resulting in a denial of service. (CVE-2018-1049)