Vulnerability identifier: #VU14737

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1000550

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Sympa
Server applications / Mail servers

Vendor: sympa.org

Description

The vulnerability allows a remote attacker to create or modify files on the filesystem.

The vulnerability exists due to input validation error when processing directory traversal sequences in wwsympa.fcgi when editing templates. A remote authenticated attacker can send a specially crafted HTTP GET or POST request and edit or create files on the system outside the webroot directory.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Sympa: 6.1.0 - 6.2b.9

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External links
http://sympa-community.github.io/security/2018-001.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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