Vulnerability identifier: #VU27939

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12697

CWE-ID: CWE-770

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Direct Mail
Web applications / Modules and components for CMS

Vendor: TYPO3

Description

The vulnerability allows a remote attacker to perofrm a denial of service (DoS) attack.

The vulnerability exists due to a functionality to log clicks on links in sent newsletters does not limit the amount of log entries generated per link. A remote attacker can use a valid link to fill the log table with a huge amount of records and cause a denial of service condition on the target system. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Direct Mail: 1.0.8 - 5.2.3

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External links
http://typo3.org/help/security-advisories
http://typo3.org/security/advisory/typo3-ext-sa-2020-005

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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.