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Improper authorization control for web services In symfony/symfony

Description

Symfony Incorrect Access Control FragmentListener in the HttpKernel component in Symfony 2.3.19 through 2.3.28, 2.4.9 through 2.4.10, 2.5.4 through 2.5.11, and 2.6.0 through 2.6.7, when ESI or SSI support enabled, does not check if the _controller attribute is set, which allows remote attackers to bypass URL signing and security rules by including (1) no hash or (2) an invalid hash in a request to /_fragment.

This issue has been fixed in Symfony 2.3.29, 2.5.12, and 2.6.8. Note that no fixes are provided for Symfony 2.4 as it's not maintained anymore.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Package
Affected version
Patched versions

Aliases

1. CVE-2015-40502. NVD-2015-40503. OSV-2015-40504. OSV-DEBIAN-2015-40505. GCVE-2015-40506. SECURITY-TRACKER-CVE-2015-4050

References

1. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2015-4050.yaml2. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2015-4050.yaml3. https://symfony.com/cve-2015-40504. https://web.archive.org/web/20200228090443/http://www.securityfocus.com/bid/749285. http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159513.html6. http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159603.html7. http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159610.html8. http://symfony.com/blog/cve-2015-4050-esi-unauthorized-access9. http://www.debian.org/security/2015/dsa-327610. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2015/CVE-2015-4050.yaml

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