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".
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-16873 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 7.5 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
Attack Vector | Network |
Attack Complexity | High |
Privileges Required | None |
User Interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity Impact | High |
Availability Impact | High |
Platform | Package | State |
---|---|---|
Red Hat OpenStack Platform Operational Tools 9 | golang | Will not fix |
Red Hat OpenShift Container Platform 3.9 | Build | Under investigation |
Red Hat OpenShift Container Platform 3.8 | Build | Under investigation |
Red Hat OpenShift Container Platform 3.7 | Build | Under investigation |
Red Hat OpenShift Container Platform 3.11 | Build | Under investigation |
Red Hat OpenShift Container Platform 3.10 | Build | Under investigation |
Red Hat Gluster Storage 3 | golang | Affected |
Red Hat Enterprise Linux OpenStack Platform 8.0 Operational Tools for RHEL 7 | golang | Will not fix |
Red Hat Enterprise Linux 7 | golang | Will not fix |
Red Hat Ceph Storage 3 | golang | Affected |
Red Hat Ceph Storage 2 | golang | Affected |