---------------------------------------------------------------------- The Secunia CSI 5.0 Beta - now available for testing Find out more, take a free test drive, and share your opinion with us: http://secunia.com/blog/242 ---------------------------------------------------------------------- TITLE: X.Org libXfont LZW Decompression Privilege Escalation Vulnerability SECUNIA ADVISORY ID: SA45544 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/45544/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=45544 RELEASE DATE: 2011-08-11 DISCUSS ADVISORY: http://secunia.com/advisories/45544/#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/45544/ 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=45544 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 reported in X.Org libXfont, which can be exploited by malicious, local users to gain escalated privileges. The vulnerability is caused due to a boundary error within the "BufCompressedFill()" function (src/fontfile/decompress.c), which can be exploited to cause a heap-based buffer overflow via specially crafted font files. The vulnerability is reported in versions prior to 1.4.4. SOLUTION: Update to version 1.4.4. PROVIDED AND/OR DISCOVERED BY: Tomas Hoger, Red Hat Security Response Team ORIGINAL ADVISORY: http://lists.freedesktop.org/archives/xorg-announce/2011-August/001721.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 ----------------------------------------------------------------------