72541 : Red Hat Linux policycoreutils seunshare sandbox/seunshare.c seunshare_mount Function /tmp Sticky Bit Manipulation Local Privilege Escalation
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Timeline

Disclosure Date
2011-02-23

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2011-1011" target="_blank">CVE</a>)</em> : 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.

Classification

Location: Local Access Required
Attack Type: Denial of Service, Input Manipulation
Impact: Loss of Integrity, Loss of Availability
Solution: Workaround
Disclosure: Vendor Verified

Products

Unknown or Incomplete

References

Security Tracker: 1025291
CVE ID: 2011-1011 (see also: NVD)
Secunia Advisory ID: 43415 43844 44034
Bugtraq ID: 46510
ISS X-Force ID: 65641
VUPEN Advisory: ADV-2011-0701 ADV-2011-0864
Mail List Post: http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0585.html
Vendor Specific News/Changelog Entry: http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056227.html
http://pkgs.fedoraproject.org/gitweb/?p=policycoreutils.git;a=blob;f=policycoreutils-rhat.patch;h=d4db5bc06027de23d12a4b3f18fa6f9b1517df27;hb=HEAD#l2197
https://bugzilla.redhat.com/show_bug.cgi?id=633544
Other Advisory URL: http://openwall.com/lists/oss-security/2011/02/23/1
http://openwall.com/lists/oss-security/2011/02/23/2
RedHat RHSA: RHSA-2011:0414

Tools & Filters

	53293

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 6.9
Source: nvd.nist.gov | Generated: 2011-02-25 | Disagree?

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