Amazon Linux 2 : glibc (ALAS-2018-1048)

critical Nessus Plugin ID 111335
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

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)

The GNU C Library (aka glibc or libc6) before 2.27 contains an off-by-one error leading to a heap-based buffer overflow in the glob function in glob.c, related to the processing of home directories using the ~ operator followed by a long string. (CVE-2017-15670)

The glob function in glob.c in the GNU C Library (aka glibc or libc6) before 2.27 contains a buffer overflow during unescaping of user names with the ~ operator.(CVE-2017-15804)

An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S in the GNU C Library (aka glibc or libc6) 2.21 through 2.27 does not correctly perform the overlapping memory check if the source memory range spans the middle of the address space, resulting in corrupt data being produced by the copy operation. This may disclose information to context-dependent attackers, or result in a denial of service, or, possibly, code execution.(CVE-2017-18269)

Solution

Run 'yum update glibc' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2018-1048.html

Plugin Details

Severity: Critical

ID: 111335

File Name: al2_ALAS-2018-1048.nasl

Version: 1.1

Type: local

Agent: unix

Published: 7/26/2018

Updated: 7/26/2018

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: cpe:2.3:o:amazon:linux:2:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-all-langpacks:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-benchtests:*:*:*:*:*:*:*, 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-langpack-aa:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-af:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ak:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-am:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-an:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-anp:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ar:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-as:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ast:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ayc:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-az:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-be:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bem:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ber:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bg:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bhb:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bho:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bo:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-br:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-brx:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-bs:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-byn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ca:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ce:*:*:*:*:*:*:*, 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p-cpe:2.3:a:amazon:linux:glibc-langpack-kk:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-kl:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-km:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-kn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ko:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-kok:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ks:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ku:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-kw:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ky:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lb:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lg:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-li:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lij:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ln:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lo:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lt:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lv:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-lzh:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mag:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mai:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mg:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mhr:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mi:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mk:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ml:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mni:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mr:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ms:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-mt:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-my:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nan:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nb:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nds:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ne:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nhn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-niu:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nl:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nr:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-nso:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-oc:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-om:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-or:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-os:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-pa:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-pap:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-pl:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ps:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-pt:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-quz:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-raj:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ro:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ru:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-rw:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sa:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sat:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sc:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sd:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-se:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sgs:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-shs:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-si:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sid:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sk:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sl:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-so:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sq:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sr:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ss:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-st:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sv:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-sw:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-szl:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ta:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tcy:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-te:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tg:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-th:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-the:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ti:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tig:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tk:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tl:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tn:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tr:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ts:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-tt:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ug:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-uk:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-unm:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ur:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-uz:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-ve:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-vi:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-wa:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-wae:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-wal:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-wo:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-xh:*:*:*:*:*:*:*, p-cpe:2.3:a:amazon:linux:glibc-langpack-yi:*:*:*:*:*:*:*, 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Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Patch Publication Date: 7/24/2018

Reference Information

CVE: CVE-2017-15670, CVE-2017-15804, CVE-2017-18269, CVE-2018-11236

ALAS: 2018-1048