Amazon Linux AMI update for kernel

Published: 2014-05-13 | Updated: 2023-05-12

Risk	High
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2014-0196
CWE-ID	CWE-362
Exploitation vector	Network
Public exploit	Vulnerability #1 is being exploited in the wild.
Vulnerable software	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Race condition

EUVDB-ID: #VU41718

Risk: High

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2014-0196

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.

Mitigation

Update the affected packages:

i686:
    perf-debuginfo-3.10.40-50.136.amzn1.i686
    perf-3.10.40-50.136.amzn1.i686
    kernel-3.10.40-50.136.amzn1.i686
    kernel-headers-3.10.40-50.136.amzn1.i686
    kernel-devel-3.10.40-50.136.amzn1.i686
    kernel-debuginfo-common-i686-3.10.40-50.136.amzn1.i686
    kernel-debuginfo-3.10.40-50.136.amzn1.i686

noarch:
    kernel-doc-3.10.40-50.136.amzn1.noarch

src:
    kernel-3.10.40-50.136.amzn1.src

x86_64:
    perf-3.10.40-50.136.amzn1.x86_64
    kernel-devel-3.10.40-50.136.amzn1.x86_64
    kernel-debuginfo-3.10.40-50.136.amzn1.x86_64
    kernel-3.10.40-50.136.amzn1.x86_64
    kernel-headers-3.10.40-50.136.amzn1.x86_64
    kernel-debuginfo-common-x86_64-3.10.40-50.136.amzn1.x86_64
    perf-debuginfo-3.10.40-50.136.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2014-339.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.