Executive Summary

Summary
Title am-utils: Insecure temporary file creation
Informations
Name GLSA-200804-09 First vendor Publication 2008-04-10
Vendor Gentoo Last vendor Modification 2008-04-10
Severity (Vendor) Normal 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:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

am-utils creates temporary files insecurely allowing local users to overwrite arbitrary files via a symlink attack.

Background

am-utils is a collection of utilities for use with the Berkeley Automounter.

Description

Tavis Ormandy discovered that, when creating temporary files, the
'expn' utility does not check whether the file already exists.

Impact

A local attacker could exploit the vulnerability via a symlink attack to overwrite arbitrary files.

Workaround

There is no known workaround at this time.

Resolution

All am-utils users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/am-utils-6.1.5"

References

[ 1 ] CVE-2008-1078 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1078

Availability

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

http://security.gentoo.org/glsa/glsa-200804-09.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200804-09.xml

CWE : Common Weakness Enumeration

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

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1
Os 1

OpenVAS Exploits

Date Description
2009-01-07 Name : Fedora Core 9 FEDORA-2008-10755 (am-utils)
File : nvt/fcore_2008_10755.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200804-09 (am-utils)
File : nvt/glsa_200804_09.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
43039 Multiple Linux am-utils / net-fs expn expn[PID] Symlink Arbitrary File Overwrite

Nessus® Vulnerability Scanner

Date Description
2009-01-16 Name : The remote Fedora host is missing a security update.
File : fedora_2008-10755.nasl - Type : ACT_GATHER_INFO
2008-04-17 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200804-09.nasl - Type : ACT_GATHER_INFO

Alert History

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0
Date Informations
2014-02-17 11:35:44
  • Multiple Updates