CVE-2018-16873 Information

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.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00044.html http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00060.html http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00011.html http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00015.html http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00010.html http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00041.html http://www.securityfocus.com/bid/106226 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16873 https://groups.google.com/forum/?pli=1!topic/golang-announce/Kw31K8G7Fi0 https://security.gentoo.org/glsa/201812-09

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1