The Sympa Community Sympa version prior to version 6.2.32 contains a Directory Traversal vulnerability in wwsympa.fcgi template editing function that can result in Possibility to create or modify files on the server filesystem. This attack appear to be exploitable via HTTP GET/POST request. This vulnerability appears to have been fixed in 6.2.32.

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4442-2 advisory.

    USN-4442-1 fixed vulnerabilities in Sympa. This update provides the corresponding updates for Ubuntu 16.04     ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Michael Kaczmarczik discovered a vulnerability in the web interface template editing function of Sympa, a mailing list manager. Owner and listmasters could use this flaw to create or modify arbitrary files in the server with privileges of sympa user or owner view list config files even if edit_list.conf prohibits it.

A vulnerability has been discovered in Sympa, a modern mailing list manager, that allows write access to files on the server filesystem.
This flaw allows to create or modify any file writable by the Sympa user, located on the server filesystem, using the function of Sympa web interface template file saving.

For Debian 8 'Jessie', this problem has been fixed in version 6.1.23~dfsg-2+deb8u2.

We recommend that you upgrade your sympa packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
183602	Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM : Sympa vulnerabilities (USN-4442-2)	Nessus	Ubuntu Local Security Checks	critical
117297	Debian DSA-4285-1 : sympa - security update	Nessus	Debian Local Security Checks	critical
111313	Debian DLA-1441-1 : sympa security update	Nessus	Debian Local Security Checks	critical

Detections

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CVE-2018-1000550

critical

Tenable Plugins

critical

critical

critical