CVE-2019-18888
Description
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.3.8+dfsg-1 |
| sid | Fixed | 4.3.8+dfsg-1 |
| forky | Fixed | 4.3.8+dfsg-1 |
| bullseye | Fixed | 4.3.8+dfsg-1 |
| bookworm | Fixed | 4.3.8+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | symfony/http-foundation | >=2.0.0,<2.8.52 | 2.8.52 |
| Packagist | symfony/http-foundation | >=3.0.0,<3.4.35 | 3.4.35 |
| Packagist | symfony/http-foundation | >=4.0.0,<4.2.12 | 4.2.12 |
| Packagist | symfony/http-foundation | >=4.3.0,<4.3.8 | 4.3.8 |
| Packagist | symfony/mime | >=4.3.0,<4.3.8 | 4.3.8 |
| Packagist | symfony/symfony | >=2.0.0,<2.8.52 | 2.8.52 |
| Packagist | symfony/symfony | >=3.0.0,<3.4.35 | 3.4.35 |
| Packagist | symfony/symfony | >=4.0.0,<4.2.12 | 4.2.12 |
| Packagist | symfony/symfony | >=4.3.0,<4.3.8 | 4.3.8 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-18888
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2019-18888.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mime/CVE-2019-18888.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18888.yaml
- https://github.com/symfony/symfony/releases/tag/v4.3.8
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ
- https://symfony.com/blog/cve-2019-18888-prevent-argument-injection-in-a-mimetypeguesser
- https://symfony.com/blog/symfony-4-3-8-released
- https://symfony.com/cve-2019-18888
- https://security-tracker.debian.org/tracker/CVE-2019-18888
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.