Home / vulnerabilities Secunia Security Advisory 43415
Posted on 07 March 2011
Source : packetstormsecurity.org Link
----------------------------------------------------------------------
Get a tax break on purchases of Secunia Solutions!
If you are a U.S. company, you may be qualified for a tax break for your software purchases. Learn more at:
http://secunia.com/products/corporate/vim/section_179/
----------------------------------------------------------------------
TITLE:
policycoreutils "seunshare" Temporary Directory Security Bypass
Weakness
SECUNIA ADVISORY ID:
SA43415
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43415/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43415
RELEASE DATE:
2011-03-07
DISCUSS ADVISORY:
http://secunia.com/advisories/43415/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/43415/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=43415
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Tavis Ormandy has reported a weakness in policycoreutils, which can
be exploited by malicious, local users to bypass certain security
features.
The weakness is caused due to the "seunshare" utility allowing
unprivileged users to create fake temporary directories without the
sticky bit being set. This can be exploited to e.g. perform symlink
attacks on applications relying on the temporary directory being
protected by the sticky bit.
SOLUTION:
Restrict access to the "seunshare" utility to trusted users only.
PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy
ORIGINAL ADVISORY:
Tavis Ormandy:
http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0585.html
Red Hat Bug #633544:
https://bugzilla.redhat.com/show_bug.cgi?id=633544
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
