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.

An update of the systemd package has been released.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3558-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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

This update was imported from the SUSE:SLE-12-SP2:Update update project.

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).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Karim Hossen & Thomas Imbert 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.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
121764	Photon OS 2.0: Systemd PHSA-2017-0045	Nessus	PhotonOS Local Security Checks	high
121759	Photon OS 1.0: Systemd PHSA-2017-0044	Nessus	PhotonOS Local Security Checks	high
106620	Ubuntu 14.04 LTS / 16.04 LTS : systemd vulnerabilities (USN-3558-1)	Nessus	Ubuntu Local Security Checks	high
106548	openSUSE Security Update : systemd (openSUSE-2018-117)	Nessus	SuSE Local Security Checks	high
106529	SUSE SLED12 / SLES12 Security Update : systemd (SUSE-SU-2018:0299-1)	Nessus	SuSE Local Security Checks	high
104213	Ubuntu 17.04 / 17.10 : systemd vulnerability (USN-3466-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2017-15908

high

Tenable Plugins

high

high

high

high

high

high