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Amazon Linux Local Check: ALAS-2015-523

Information

Severity

Severity

Critical

Family

Family

Amazon Linux Local Security Checks

CVSSv2 Base

CVSSv2 Base

9.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

7 years ago

Modified

Modified

4 years ago

Summary

Amazon Linux Local Security Checks

Insight

Insight

A buffer overflow flaw was found in the way the Linux kernel's Intel AES-NI instructions optimized version of the RFC4106 GCM mode decryption functionality handled fragmented packets. A remote attacker could use this flaw to crash, or potentially escalate their privileges on, a system over a connection with an active AEC-GCM mode IPSec security association. (CVE-2015-3331 )It was found that the Linux kernel's ping socket implementation did not properly handle socket unhashing during spurious disconnects, which could lead to a use-after-free flaw. On x86-64 architecture systems, a local user able to create ping sockets could use this flaw to crash the system. On non-x86-64 architecture systems, a local user able to create ping sockets could use this flaw to escalate their privileges on the system. (CVE-2015-3636 )

Solution

Solution

Run yum clean all followed by yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.

Common Vulnerabilities and Exposures (CVE)