Amazon Linux AMI : golang (ALAS-2018-1130)

high Nessus Plugin ID 119689

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Synopsis

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

Description

In Go before 1.10.6 and 1.11.x before 1.11.3, the 'go get' command is vulnerable to remote code execution when executed with the -u flag and the import path of a malicious Go package, or a package that imports it directly or indirectly. Specifically, it is only vulnerable in GOPATH mode, but not in module mode (the distinction is documented at https://golang.org/cmd/go/#hdr-Module_aware_go_get). Using custom domains, it's possible to arrange things so that a Git repository is cloned to a folder named '.git' by using a vanity import path that ends with '/.git'. If the Git repository root contains a 'HEAD' file, a 'config' file, an 'objects' directory, a 'refs' directory, with some work to ensure the proper ordering of operations, 'go get -u' can be tricked into considering the parent directory as a repository root, and running Git commands on it. That will use the 'config' file in the original Git repository root for its configuration, and if that config file contains malicious commands, they will execute on the system running 'go get -u'. (CVE-2018-16873)

The crypto/x509 package of Go before 1.10.6 and 1.11.x before 1.11.3 does not limit the amount of work performed for each chain verification, which might allow attackers to craft pathological inputs leading to a CPU denial of service. Go TLS servers accepting client certificates and TLS clients are affected. (CVE-2018-16875)

In Go before 1.10.6 and 1.11.x before 1.11.3, the 'go get' command is vulnerable to directory traversal when executed with the import path of a malicious Go package which contains curly braces (both '{' and '}' characters). Specifically, it is only vulnerable in GOPATH mode, but not in module mode (the distinction is documented at https://golang.org/cmd/go/#hdr-Module_aware_go_get). The attacker can cause an arbitrary filesystem write, which can lead to code execution.
(CVE-2018-16874)

Solution

Run 'yum update golang' to update your system.

Plugin Details

Severity: High

ID: 119689

File Name: ala_ALAS-2018-1130.nasl

Version: 1.6

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 12/17/2018

Updated: 3/27/2020

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2018-16874

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:golang, p-cpe:/a:amazon:linux:golang-bin, p-cpe:/a:amazon:linux:golang-docs, p-cpe:/a:amazon:linux:golang-misc, p-cpe:/a:amazon:linux:golang-race, p-cpe:/a:amazon:linux:golang-src, p-cpe:/a:amazon:linux:golang-tests, cpe:/o:amazon:linux

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2018

Vulnerability Publication Date: 12/14/2018

Reference Information

CVE: CVE-2018-16873, CVE-2018-16874, CVE-2018-16875

ALAS: 2018-1130

Detections

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