Zsh difflog.pl symlink

zsh-difflog-symlink (38812)

Medium Risk

Description:

Zsh could allow a local attacker to launch a symlink attack. The difflog.pl script creates insecure temporary files. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to other files on the system using the insecure difflog.pl script which would allow the attacker to overwrite or delete 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:	3.1
Exploitability:	High
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

File Manipulation

Remedy:

No remedy available as of February 6, 2010.

References:

• Gentoo Bugzilla Bug 201022: app-shells/zsh insecure temporary file creation (CVE requested).
• Zsh Web site: Zsh.
• BID-26674: Zsh Insecure Temporary File Creation Vulnerability
• CVE-2007-6209: Util/difflog.pl in zsh 4.3.4 allows local users to overwrite arbitrary files via a symlink attack on temporary files.
• SA27899: Zsh difflog.pl Insecure Temporary Files

Platforms Affected:

• Geoff Wing Zsh 4.3.4 and prior

Reported:

Dec 02, 2007

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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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