Amazon Linux AMI : glibc (ALAS-2018-1109)

high Nessus Plugin ID 119468
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VPR Score: 6.7


The remote Amazon Linux AMI host is missing a security update.


A buffer overflow has been discovered in the GNU C Library (aka glibc or libc6) in the __mempcpy_avx512_no_vzeroupper function when particular conditions are met. An attacker could use this vulnerability to cause a denial of service or potentially execute code.(CVE-2018-11237)

elf/dl-load.c in the GNU C Library (aka glibc or libc6) 2.19 through 2.26 mishandles RPATH and RUNPATH containing $ORIGIN for a privileged (setuid or AT_SECURE) program, which allows local users to gain privileges via a Trojan horse library in the current working directory, related to the fillin_rpath and decompose_rpath functions.
This is associated with misinterpretion of an empty RPATH/RUNPATH token as the './' directory. NOTE: this configuration of RPATH/RUNPATH for a privileged program is apparently very uncommon; most likely, no such program is shipped with any common Linux distribution.(CVE-2017-16997)

stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.(CVE-2018-11236)

An integer overflow in the implementation of the posix_memalign in memalign functions in the GNU C Library (aka glibc or libc6) 2.26 and earlier could cause these functions to return a pointer to a heap area that is too small, potentially leading to heap corruption.(CVE-2018-6485)


Run 'yum update glibc' to update your system.

See Also

Plugin Details

Severity: High

ID: 119468

File Name: ala_ALAS-2018-1109.nasl

Version: 1.3

Type: local

Agent: unix

Published: 12/7/2018

Updated: 6/9/2020

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: High

VPR Score: 6.7

CVSS Score Source: CVE-2017-16997

CVSS v2.0

Base Score: 9.3

Temporal Score: 7.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:o:amazon:linux:*:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-common:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-debuginfo-common:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-headers:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-static:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-utils:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:nscd:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/7/2018

Vulnerability Publication Date: 12/18/2017

Reference Information

CVE: CVE-2017-16997, CVE-2018-6485, CVE-2018-11236, CVE-2018-11237

ALAS: 2018-1109