# CVE-2020-11934: golang-github-snapcore-snapd-dev: It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the sy...

CVE-2020-11934 is fixed in 9 products on 1 platform, first by golang-github-snapcore-snapd-dev 2.45.1+18.04.2, released July 15, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-11934
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 15, 2020

## Description

It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDG_DATA_DIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. Fixed in snapd versions 2.45.1ubuntu0.2, 2.45.1+18.04.2 and 2.45.1+20.04.2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | golang-github-snapcore-snapd-dev Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [golang-github-snapcore-snapd-dev 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-golang-github-snapcore-snapd-dev-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | golang-github-snapcore-snapd-dev Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [golang-github-snapcore-snapd-dev 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-golang-github-snapcore-snapd-dev-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | golang-github-ubuntu-core-snappy-dev Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [golang-github-ubuntu-core-snappy-dev 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-golang-github-ubuntu-core-snappy-dev-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | golang-github-ubuntu-core-snappy-dev Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [golang-github-ubuntu-core-snappy-dev 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-golang-github-ubuntu-core-snappy-dev-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | snap-confine Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [snap-confine 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-snap-confine-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | snap-confine Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [snap-confine 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-snap-confine-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | snapd Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [snapd 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-snapd-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | snapd Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [snapd 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-snapd-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | snapd-xdg-open Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [snapd-xdg-open 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-snapd-xdg-open-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | snapd-xdg-open Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [snapd-xdg-open 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-snapd-xdg-open-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-core-launcher Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [ubuntu-core-launcher 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ubuntu-core-launcher-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-core-launcher Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [ubuntu-core-launcher 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ubuntu-core-launcher-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-core-snapd-units Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [ubuntu-core-snapd-units 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ubuntu-core-snapd-units-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-core-snapd-units Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [ubuntu-core-snapd-units 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ubuntu-core-snapd-units-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-snappy Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [ubuntu-snappy 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ubuntu-snappy-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-snappy Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [ubuntu-snappy 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ubuntu-snappy-2.45.1-20.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-snappy-cli Ubuntu 18.04.6 LTS (bionic) | 2.45.1+18.04.2 | [ubuntu-snappy-cli 2.45.1+18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ubuntu-snappy-cli-2.45.1-18.04.2.md) | Jul 15, 2020 |
| Linux | ubuntu-snappy-cli Ubuntu 20.04 LTS (focal) | 2.45.1+20.04.2 | [ubuntu-snappy-cli 2.45.1+20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ubuntu-snappy-cli-2.45.1-20.04.2.md) | Jul 15, 2020 |

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