CVE-2018-1049

Description

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.

CVSS Metrics

• v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.46%• Percentile: 65%

Techniques & Countermeasures

• CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

• canonical•ubuntu_linux

  14.04 | 16.04

• debian•debian_linux

  8.0

• red hat, inc.•systemd

  prior to 234

• redhat•enterprise_linux

  7.0

• redhat•enterprise_linux_aus

  7.4 | 7.6

• redhat•enterprise_linux_desktop

  7.0

• redhat•enterprise_linux_server

  7.0

• redhat•enterprise_linux_server_aus

  7.4 | 7.6

• redhat•enterprise_linux_server_eus

  7.4 | 7.5 | 7.6

• redhat•enterprise_linux_server_tus

  7.4 | 7.6

• redhat•enterprise_linux_workstation

  7.0

• systemd_project•systemd

  < 234

References (5)

• http://www.securitytracker.com/id/1041520
• https://lists.debian.org/debian-lts-announce/2018/11/msg00017.html
• https://access.redhat.com/errata/RHSA-2018:0260
• https://bugzilla.redhat.com/show_bug.cgi?id=1534701
• https://usn.ubuntu.com/3558-1/