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

High Nessus Plugin ID 119689

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.

See Also

https://alas.aws.amazon.com/ALAS-2018-1130.html

Plugin Details

Severity: High

ID: 119689

File Name: ala_ALAS-2018-1130.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2018/12/17

Updated: 2019/02/05

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

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

CVSS v3.0

Base Score: 8.1

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

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

Patch Publication Date: 2018/12/14

Vulnerability Publication Date: 2018/12/14

Reference Information

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

ALAS: 2018-1130

IAVB: 2018-B-0155