#VU181 Information disclosure in TYPO3 backend in TYPO3

Vulnerability identifier: #VU181

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TYPO3
Web applications / CMS

Vendor: TYPO3

Description
The vulnerability allows a remote attacker to receive valid backend usernames.

The vulnerability exists in the TYPO3 backend module. A remote user can receive valid backend usernames by guessing the file path to the cache files.

Successful exploitation of this vulnerability may result in disclosure of system information.

Mitigation
Install the latest versions (6.2.26, 7.6.10, 8.2.1).

Vulnerable software versions

TYPO3: 6.2.0 rc1 - 6.2.25, 7.6.0 - 7.6.9, 8.0.0 - 8.2.0

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External links
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-017/

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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.