# CVE-2019-12439: bubblewrap: bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point

CVE-2019-12439 is fixed in bubblewrap on 1 platform by bubblewrap 0.2.1-1ubuntu0.1+esm2 (version 0.2.1-1ubuntu0.1+esm2), released May 29, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-12439
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0058
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 29, 2019

## Description

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bubblewrap Ubuntu 18.04.6 LTS (bionic) | 0.2.1-1ubuntu0.1+esm2 | [bubblewrap 0.2.1-1ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bubblewrap-0.2.1-1ubuntu0.1-esm2.md) | May 29, 2019 |

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