#VU32865 Improper access control in TYPO3 - CVE-2016-5091

Vulnerability identifier: #VU32865

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-5091

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TYPO3
Web applications / CMS

Vendor: TYPO3

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Extbase request handling. A remote attacker can send a specially crafted request, bypass implemented security restrictions and execute arbitrary Extbase actions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TYPO3: 4.3.0 - 4.7.20, 6.0.0 beta1 - 6.2.23, 7.0.0 - 7.6.7, 8.0.0 - 8.1.0

---

External links
https://www.openwall.com/lists/oss-security/2016/05/25/4
https://www.openwall.com/lists/oss-security/2016/05/26/2
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-013/

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.