Vulnerability CVE-2011-1011
Published: 2011-02-24   Modified: 2012-02-13

Description:
The seunshare_mount function in sandbox/seunshare.c in seunshare in certain Red Hat packages of policycoreutils 2.0.83 and earlier in Red Hat Enterprise Linux (RHEL) 6 and earlier, and Fedora 14 and earlier, mounts a new directory on top of /tmp without assigning root ownership and the sticky bit to this new directory, which allows local users to replace or delete arbitrary /tmp files, and consequently cause a denial of service or possibly gain privileges, by running a setuid application that relies on /tmp, as demonstrated by the ksu application.

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.9/10
10/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Redhat -> Policycoreutils 
Redhat -> Enterprise linux 
Redhat -> Fedora 

 References:
http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0585.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056227.html
http://openwall.com/lists/oss-security/2011/02/23/1
http://openwall.com/lists/oss-security/2011/02/23/2
http://pkgs.fedoraproject.org/gitweb/?p=policycoreutils.git;a=blob;f=policycoreutils-rhat.patch;h=d4db5bc06027de23d12a4b3f18fa6f9b1517df27;hb=HEAD#l2197
http://www.redhat.com/support/errata/RHSA-2011-0414.html
http://www.securityfocus.com/bid/46510
http://www.securitytracker.com/id?1025291
http://www.vupen.com/english/advisories/2011/0701
http://www.vupen.com/english/advisories/2011/0864
https://bugzilla.redhat.com/show_bug.cgi?id=633544
https://exchange.xforce.ibmcloud.com/vulnerabilities/65641
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