Rapid7 Vulnerability & Exploit Database

Amazon Linux AMI: CVE-2016-4557: Security patch for kernel (ALAS-2016-703)

Back to Search

Amazon Linux AMI: CVE-2016-4557: Security patch for kernel (ALAS-2016-703)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
05/18/2016
Created
07/25/2018
Added
05/18/2016
Modified
05/07/2019

Description

The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • amazon-linux-upgrade-kernel

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;