Home / vulnerabilities Secunia Security Advisory 43496
Posted on 14 March 2011
Source : packetstormsecurity.org Link
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TITLE:
Linux Kernel "/proc/<pid>/" Permissions Handling Weakness
SECUNIA ADVISORY ID:
SA43496
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43496/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43496
RELEASE DATE:
2011-03-14
DISCUSS ADVISORY:
http://secunia.com/advisories/43496/#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/43496/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=43496
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:
halfdog has discovered a weakness in the Linux Kernel, which can be
exploited by malicious, local users to bypass certain security
restrictions.
The weakness is caused due to improper permissions handling of opened
files within the "/proc/<pid>/" directory when a SUID program is being
executed. This can be exploited to disclose certain memory information
or manipulate some process settings (e.g. coredump_filter).
The weakness is confirmed in version 2.6.37. Other versions may also
be affected.
SOLUTION:
Restrict access to trusted users only.
PROVIDED AND/OR DISCOVERED BY:
halfdog
ORIGINAL ADVISORY:
halfdog:
http://www.halfdog.net/Security/2011/SuidBinariesAndProcInterface/
LKML:
https://lkml.org/lkml/2011/2/7/368
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/
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