CVE-2018-1120

Impact:
Moderate
Public Date:
2018-05-17
CWE:
CWE-122
Bugzilla:
1575472: CVE-2018-1120 kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service
By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).

Find out more about CVE-2018-1120 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 2.8
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity Impact None
Availability Impact Low

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Affected
Red Hat Enterprise Linux 7 kernel-alt Affected
Red Hat Enterprise Linux 7 kernel Affected
Red Hat Enterprise Linux 7 kernel-rt Affected
Red Hat Enterprise Linux 6 kernel Affected
Red Hat Enterprise Linux 5 kernel Will not fix

Acknowledgements

Red Hat would like to thank Qualys Research Labs for reporting this issue.

External References

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