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Information Exposure Affecting perf package, versions <0:4.14.77-80.57.amzn2

Severity

 Recommended
low

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.08% (34th percentile)

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  • Snyk IDSNYK-AMZN2-PERF-1673731
  • published27 Sept 2021
  • disclosed8 Mar 2018
Report a new vulnerability Found a mistake?

Introduced: 8 Mar 2018

CVE-2018-7755  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 perf to version 0:4.14.77-80.57.amzn2 or higher.
This issue was patched in ALAS2-2019-1279.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.