ALAS-2021-1524


Amazon Linux AMI Security Advisory: ALAS-2021-1524
Advisory Release Date: 2021-07-20 22:24 Pacific
Advisory Updated Date: 2021-07-21 18:30 Pacific
Severity: Important
References: CVE-2021-33909 

Issue Overview:

An out-of-bounds write flaw was found in the Linux kernel's seq_file in the Filesystem layer. This flaw allows a local attacker with a user privilege to gain access to out-of-bound memory, leading to a system crash or a leak of internal kernel information. The issue results from not validating the size_t-to-int conversion prior to performing operations. The highest threat from this vulnerability is to data integrity, confidentiality and system availability. (CVE-2021-33909)


Affected Packages:

kernel


Issue Correction:
Run yum update kernel to update your system.

New Packages:
i686:
    kernel-debuginfo-4.14.238-125.422.amzn1.i686
    kernel-4.14.238-125.422.amzn1.i686
    kernel-tools-4.14.238-125.422.amzn1.i686
    kernel-tools-debuginfo-4.14.238-125.422.amzn1.i686
    kernel-devel-4.14.238-125.422.amzn1.i686
    kernel-headers-4.14.238-125.422.amzn1.i686
    perf-4.14.238-125.422.amzn1.i686
    kernel-debuginfo-common-i686-4.14.238-125.422.amzn1.i686
    kernel-tools-devel-4.14.238-125.422.amzn1.i686
    perf-debuginfo-4.14.238-125.422.amzn1.i686

src:
    kernel-4.14.238-125.422.amzn1.src

x86_64:
    kernel-devel-4.14.238-125.422.amzn1.x86_64
    kernel-headers-4.14.238-125.422.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.238-125.422.amzn1.x86_64
    kernel-4.14.238-125.422.amzn1.x86_64
    perf-4.14.238-125.422.amzn1.x86_64
    kernel-tools-4.14.238-125.422.amzn1.x86_64
    kernel-tools-debuginfo-4.14.238-125.422.amzn1.x86_64
    perf-debuginfo-4.14.238-125.422.amzn1.x86_64
    kernel-tools-devel-4.14.238-125.422.amzn1.x86_64
    kernel-debuginfo-4.14.238-125.422.amzn1.x86_64