CVE-2020-15094
Description
In Symfony before versions 4.4.13 and 5.1.5, the CachingHttpClient class from the HttpClient Symfony component relies on the HttpCache class to handle requests. HttpCache uses internal headers like X-Body-Eval and X-Body-File to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by CachingHttpClient and if an attacker can control the response for a request being made by the CachingHttpClient, remote code execution is possible. This has been fixed in versions 4.4.13 and 5.1.5.
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 | 4.4.13+dfsg-1 |
| sid | Fixed | 4.4.13+dfsg-1 |
| forky | Fixed | 4.4.13+dfsg-1 |
| bullseye | Fixed | 4.4.13+dfsg-1 |
| bookworm | Fixed | 4.4.13+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | symfony/http-kernel | >=4.3.0,<4.4.13 | 4.4.13 |
| Packagist | symfony/http-kernel | >=5.0.0,<5.1.5 | 5.1.5 |
| Packagist | symfony/symfony | >=4.3.0,<4.4.13 | 4.4.13 |
| Packagist | symfony/symfony | >=5.0.0,<5.1.5 | 5.1.5 |
References
- https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
- https://nvd.nist.gov/vuln/detail/CVE-2020-15094
- https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2020-15094.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-15094.yaml
- https://github.com/symfony/symfony
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC
- https://packagist.org/packages/symfony/http-kernel
- https://packagist.org/packages/symfony/symfony
- https://symfony.com/cve-2020-15094
- https://security-tracker.debian.org/tracker/CVE-2020-15094
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.