Executive Summary

Summary
Title MLDonkey: Privilege escalation
Informations
Name GLSA-200710-25 First vendor Publication 2007-10-24
Vendor Gentoo Last vendor Modification 2007-10-24
Severity (Vendor) High Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

The Gentoo MLDonkey ebuild adds a user to the system with a valid login shell and no password.

Background

MLDonkey is a peer-to-peer filesharing client that connects to several different peer-to-peer networks, including Overnet and BitTorrent.

Description

The Gentoo MLDonkey ebuild adds a user to the system named "p2p" so that the MLDonkey service can run under a user with low privileges.
This user is created with a valid login shell and no password.

Impact

A remote attacker could log into a vulnerable system as the p2p user.
This would require an installed login service that permitted empty passwords, such as SSH configured with the "PermitEmptyPasswords yes"
option, a local login console, or a telnet server.

Workaround

See Resolution.

Resolution

Change the p2p user's shell to disallow login. For example, as root run the following command:

# usermod -s /bin/false p2p

NOTE: updating to the current MLDonkey ebuild will not remove this vulnerability, it must be fixed manually. The updated ebuild is to prevent this problem from occurring in the future.

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200710-25.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200710-25.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

OpenVAS Exploits

Date Description
2008-09-24 Name : Gentoo Security Advisory GLSA 200710-25 (mldonkey)
File : nvt/glsa_200710_25.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
38627 MLDonkey on Gentoo Linux Default Unpassworded p2p Account

Nessus® Vulnerability Scanner

Date Description
2007-10-25 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200710-25.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:35:13
  • Multiple Updates