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.

The remote Oracle Linux 5 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2007-0542 advisory.

    [0.2.6-1]
    - Don't allow categories > 1023     Resolves: #288941

    [0.2.3-1]
    - Additional fix to handle ssh root/sysadm_r/s0:c1,c2     Resolves: #224637

    [0.2.1-1]
    - Rewrite to handle MLS properly     Resolves: #225355

    [0.1.10-2]
    - Cleanup memory when complete

    [0.1.10-1]
    - Fix Memory Leak     Resolves: #218173

    [0.1.9-1]
    - Add -pie
    - Fix compiler warnings
    - Fix Memory Leak     Resolves: #218173

    [0.1.8-3]
    - Fix subsys locking in init script

    [0.1.8-1]
    - Only allow one version to run
    - rebuild

    [0.1.7-1]
    - Apply sgrubb patch to only call getpeercon on translations

    [0.1.6-1]
    - Exit gracefully when selinux is not enabled

    [0.1.5-1]
    - Fix sighup handling

    [0.1.4-1]
    - Add patch from sgrubb
    -       Fix 64 bit size problems
    -       Increase the open file limit
    -       Make sure maximum size is not exceeded

    [0.1.3-1]
    - Move initscripts to /etc/rc.d/init.d

    [0.1.2-1]
    - Drop Privs

    [0.1.1-1]
    - Initial Version
    - This daemon reuses the code from libsetrans

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

An algorithmic complexity weakness was found in the way the mcstrans daemon handled ranges of compartments in sensitivity labels. A local user could trigger this flaw causing mctransd to temporarily stop responding to other requests; a partial denial of service.
(CVE-2007-4570)

This update also fixes a problem where the mcstrans daemon was preventing SSH connections into an SELinux box, that was running a Multi-Level Security (MLS) Policy with multiple categories

The remote Redhat Enterprise Linux 5 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2007:0542 advisory.

    mcstrans is the translation daemon used on SELinux machines to translate     program context into human readable form.

    An algorithmic complexity weakness was found in the way the mcstrans daemon     handled ranges of compartments in sensitivity labels. A local user could     trigger this flaw causing mctransd to temporarily stop responding to other     requests; a partial denial of service.  (CVE-2007-4570)

    This update also fixes a problem where the mcstrans daemon was preventing     SSH connections into an SELinux box, that was running a Multi-Level     Security (MLS) Policy with multiple categories.

    Users of mcstrans are advised to upgrade to this updated package, which     resolves this issue.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
180626	Oracle Linux 5 : mcstrans (ELSA-2007-0542)	Nessus	Oracle Linux Local Security Checks	medium
60289	Scientific Linux Security Update : mcstrans on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	low
27830	RHEL 5 : mcstrans (RHSA-2007:0542)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2007-4570

medium

Tenable Plugins

medium

low

medium