Amazon Linux AMI update for kernel

Published: 2020-02-07

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-19062 CVE-2019-19332
CWE-ID	CWE-401 CWE-787
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU23019

Risk: Low

CVSSv3.1: 5.4 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19062

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the "crypto_report()" function in "crypto/crypto_user_base.c" file. A local attacker can cause a denial of service condition (memory consumption) by triggering "crypto_report_alg()" failures.

Mitigation

Update the affected packages:

i686:
    kernel-debuginfo-common-i686-4.14.165-102.185.amzn1.i686
    kernel-debuginfo-4.14.165-102.185.amzn1.i686
    kernel-headers-4.14.165-102.185.amzn1.i686
    kernel-tools-4.14.165-102.185.amzn1.i686
    kernel-devel-4.14.165-102.185.amzn1.i686
    perf-debuginfo-4.14.165-102.185.amzn1.i686
    kernel-tools-devel-4.14.165-102.185.amzn1.i686
    perf-4.14.165-102.185.amzn1.i686
    kernel-4.14.165-102.185.amzn1.i686
    kernel-tools-debuginfo-4.14.165-102.185.amzn1.i686

src:
    kernel-4.14.165-102.185.amzn1.src

x86_64:
    kernel-4.14.165-102.185.amzn1.x86_64
    kernel-debuginfo-4.14.165-102.185.amzn1.x86_64
    kernel-tools-4.14.165-102.185.amzn1.x86_64
    kernel-devel-4.14.165-102.185.amzn1.x86_64
    perf-debuginfo-4.14.165-102.185.amzn1.x86_64
    kernel-headers-4.14.165-102.185.amzn1.x86_64
    kernel-tools-debuginfo-4.14.165-102.185.amzn1.x86_64
    perf-4.14.165-102.185.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.165-102.185.amzn1.x86_64
    kernel-tools-devel-4.14.165-102.185.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1338.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU28404