CVE-2015-4050
MEDIUM severity · CVSS 4.3 · Improper access control
4.3CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexity—
Privileges required—
User interaction—
Confidentiality impactNone
Integrity impact—
Availability impactNone
Exploit probability (EPSS)76%
AV:N/AC:M/Au:N/C:N/I:P/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://symfony.com/blog/cve-2015-4050-esi-unauthorized-accessAdvisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159513.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159603.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159610.html
- http://www.debian.org/security/2015/dsa-3276
- http://www.securityfocus.com/bid/74928
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159513.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159603.html