Executive Summary

Summary
Title fcron: Information disclosure
Informations
Name GLSA-201311-16 First vendor Publication 2013-11-25
Vendor Gentoo Last vendor Modification 2013-11-25
Severity (Vendor) Low 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:L/AC:M/Au:N/C:P/I:N/A:N)
Cvss Base Score 1.9 Attack Range Local
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A vulnerability has been found in fcron, allowing local attackers to conduct symlink attacks.

Background

fcron is a periodic command scheduler for Unix-based systems

Description

The fcrontab function contains a race condition relating to symlinks.

Impact

A local attacker could perform symlink attacks to read arbitrary files with the privileges of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All fcron users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-process/fcron-3.0.5-r2"

References

[ 1 ] CVE-2010-0792 : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-0792

Availability

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

http://security.gentoo.org/glsa/glsa-201311-16.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-201311-16.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-59 Improper Link Resolution Before File Access ('Link Following')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 34

OpenVAS Exploits

Date Description
2010-03-31 Name : Fedora Update for fcron FEDORA-2010-4063
File : nvt/gb_fedora_2010_4063_fcron_fc12.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
62718 Fcron fcrontab Symlink Race Condition Arbitrary File Access

Fcron contains a flaw that may lead to an unauthorized information disclosure.  The issue is triggered due to race condition errors in the "fcrontab" utility, which will disclose arbitrary files to a local attacker via symlink attacks.

Nessus® Vulnerability Scanner

Date Description
2013-11-26 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201311-16.nasl - Type : ACT_GATHER_INFO
2010-07-01 Name : The remote Fedora host is missing a security update.
File : fedora_2010-4063.nasl - Type : ACT_GATHER_INFO
2010-07-01 Name : The remote Fedora host is missing a security update.
File : fedora_2010-4084.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2014-02-17 11:37:55
  • Multiple Updates
2013-11-25 21:18:58
  • First insertion