Improper Locking Affecting kernel package, versions <0:4.14.133-88.105.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (24th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNEL-1718213
  • published27 Sept 2021
  • disclosed29 Apr 2019

Introduced: 29 Apr 2019

CVE-2019-11599  (opens in a new tab)
CWE-667  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel to version 0:4.14.133-88.105.amzn1 or higher.
This issue was patched in ALAS-2019-1232.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

The coredump implementation in the Linux kernel before 5.0.10 does not use locking or other mechanisms to prevent vma layout or vma flags changes while it runs, which allows local users to obtain sensitive information, cause a denial of service, or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls. This is related to fs/userfaultfd.c, mm/mmap.c, fs/proc/task_mmu.c, and drivers/infiniband/core/uverbs_main.c.

References

CVSS Scores

version 3.1