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TITLE:
Linux-PAM Modules Information Disclosure and Privilege Escalation

SECUNIA ADVISORY ID:
SA42088

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42088/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42088

RELEASE DATE:
2010-11-03

DISCUSS ADVISORY:
http://secunia.com/advisories/42088/#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/42088/

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=42088

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:
Multiple security issues have been reported in Linux-PAM, which can
be exploited by malicious, local users to disclose potentially
sensitive information and perform certain actions with escalated
privileges.

1) Some errors in the "pam_mail" module when dropping privileges can
be exploited to check for the presence of certain mail files.

2) An error in the "pam_env" module when dropping privileges can be
exploited to disclose the contents of arbitrary files by e.g.
symlinking the "~/.pam_environment" file to a restricted file.

3) An error in the "pam_namespace" module when executing the
namespace init script can be exploited to escalate privileges by e.g.
using specially crafted environment variables when running a setuid
program.

The security issues are reported in versions prior to 1.1.3.

SOLUTION:
Update to version 1.1.3.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/ChangeLog?revision=1.546&view=markup&pathrev=Linux-PAM-1_1_3

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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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.

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