Fcron "dot dot" directory traversal

fcron-dotdot-directory-traversal (24504)

Medium Risk

Description:

Fcron could allow a local attacker to traverse directories on the server. A local attacker could send specially-crafted arguments to the convert-fcrontab script containing "dot dot" sequences (/../), which would allow the attacker to traverse directories and create temporary files outside the /var/spool/fcron directory.

*CVSS:

Base Score:	2.5
Access Vector:	Local
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	Partial
Integrity Impact:	None
Availability Impact:	None
Temporal Score:	2.2
Exploitability:	High
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

File Manipulation

Remedy:

Upgrade to the latest version of fcron (fcron-2.9.5.1-4tr.i586.rpm or later), available from the Trustix Secure Linux Web site. See References.

References:

• Fcron Web site: Welcome to Fcron's home page !.
• Trustix Secure Linux Web site: Trustix Secure Linux.
• BID-25693: Fcron Convert-FCronTab Directory Traversal Vulnerability
• CVE-2006-0575: convert-fcrontab in Fcron 2.9.5 and 3.0.0 allows remote attackers to create or overwrite arbitrary files via .. sequences and a symlink attack on the temporary file that is used during conversion.
• SA18719: Trustix Fcron "convert-fcrontab" Two Vulnerabilities

Platforms Affected:

• Thibault Godouet Fcron 3.0.0 and prior

Reported:

Feb 03, 2006

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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