Citadel migrate_aliases.sh symlink

citadel-migratealiases-symlink (44734)

Medium Risk

Description:

Citadel could allow a local attacker to launch a symlink attack, caused by an error in the migrate_aliases.sh script. Temporary files are created with insecure permissions. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to other files on the system, which would allow the attacker to overwrite arbitrary files on the system with elevated privileges.

*CVSS:

Base Score:	3.3
Access Vector:	Local
Access Complexity:	Medium
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	2.9
Exploitability:	High
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

File Manipulation

Remedy:

Upgrade to the latest version of Citadel (version 7.38 or later), available from the Citadel Web site. See References.

References:

• Citadel Web site: Citadel.
• Debian Bug report logs - #496359: The possibility of attack with the help of symlinks in some Debian packages .
• BID-30877: Citadel Insecure Temporary File Creation Vulnerability
• CVE-2008-3930: migrate_aliases.sh in Citadel Server 7.37 allows local users to overwrite arbitrary files via a symlink attack on a temporary file.
• SA31648: Citadel "migrate_aliases.sh" Insecure Temporary Files

Platforms Affected:

• Citadel Citadel 7.37

Reported:

Aug 24, 2008

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For corrections or additions please email xforce@iss.net

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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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