Red Hat Enterprise Linux mctrans daemon denial of service

rhel-mctrans-dos (38357)

Medium Risk

Description:

The Red Hat Enterprise Linux MCS translation daemon (mctransd) is vulnerable to a denial of service caused by improper validation of user-supplied input by the substitute_range() function. A local attacker could exploit this vulnerability to cause mctransd to temporarily stop responding to other requests.

*CVSS:

Base Score:	2.1
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	1.6
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Apply the appropriate update for your system. See References.

References:

• Red Hat Bugzilla Bug 288201: CVE-2007-4570 mctransd DoS.
• BID-26371: Mcstrans Mcstrans.C Local Denial of Service Vulnerability
• CVE-2007-4570: Algorithmic complexity vulnerability in the MCS translation daemon in mcstrans 0.2.3 allows local users to cause a denial of service (temporary daemon outage) via a large range of compartments in sensitivity labels.
• RHSA-2007-0542: Low: mcstrans security and bug fix update

Platforms Affected:

• RedHat Enterprise Linux 5 Client
• RedHat Enterprise Linux 5
• RedHat mctrans 0.2.3

Reported:

Nov 07, 2007

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