---------------------------------------------------------------------- Secunia is hiring! Find your next job here: http://secunia.com/company/jobs/ ---------------------------------------------------------------------- TITLE: GNU C Library "__tzfile_read()" Buffer Overflow Vulnerability SECUNIA ADVISORY ID: SA47064 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/47064/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=47064 RELEASE DATE: 2011-12-06 DISCUSS ADVISORY: http://secunia.com/advisories/47064/#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/47064/ 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=47064 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: A vulnerability has been discovered in the GNU C Library, which potentially can be exploited by malicious users to compromise a vulnerable system. The vulnerability is caused due to an error within the "__tzfile_read()" function (time/tzfile.c) and can be exploited to cause a heap-based buffer overflow via a specially crafted timezone file. Successful exploitation may allow the execution of arbitrary code but requires that a malicious timezone file is loaded (e.g. by uploading it into the chroot of an FTP server). The vulnerability is confirmed in version 2.14.1. Other versions may also be affected. SOLUTION: Restrict access to trusted users only. PROVIDED AND/OR DISCOVERED BY: dividead Additional information about the attack vector provided by Kingcope. ORIGINAL ADVISORY: Dividead: http://dividead.wordpress.com/2009/06/01/glibc-timezone-integer-overflow/ Kingcope: http://archives.neohapsis.com/archives/fulldisclosure/2011-12/0059.html OTHER REFERENCES: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ DEEP LINKS: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED DESCRIPTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED SOLUTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXPLOIT: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ ---------------------------------------------------------------------- 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 ----------------------------------------------------------------------