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Amazon Linux: Security Advisory (ALAS-2012-45)
Information
Severity
Severity
Medium
Family
Family
Amazon Linux Local Security Checks
CVSSv2 Base
CVSSv2 Base
4.9
CVSSv2 Vector
CVSSv2 Vector
AV:L/AC:L/Au:N/C:N/I:N/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
8 years ago
Modified
Modified
2 years ago
Summary
The remote host is missing an update announced via the referenced Security Advisory.
Insight
Insight
The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.
Solution
Solution
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.