|lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Date: Wed, 24 Jan 2007 11:39:07 -0800 From: zdi-disclosures@...m.com To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com Cc: zdi-disclosures@...m.com Subject: ZDI-07-006: Citrix Metaframe Presentation Server Print Provider Buffer Overflow Vulnerability ZDI-07-006: Citrix Metaframe Presentation Server Print Provider Buffer Overflow Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-07-006.html January 24, 2007 -- CVE ID: CVE-2007-0444 -- Affected Vendor: Citrix -- Affected Products: Citrix Presentation Server 4.0 Citrix MetaFrame Presentation Server 3.0 Citrix MetaFrame XP 1.0 -- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability since July 7, 2005 by the pre-existing Digital Vaccine protection filter ID 3583. For further product information on the TippingPoint IPS: http://www.tippingpoint.com -- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on systems with vulnerable installations of Citrix Presentation Server, Metaframe Presentation Server or MetaFrame XP. Authentication is not required to exploit this vulnerability. The specific flaw exists in a print provider installed by the Presentation Server. The cpprov.dll library doesn't properly handle certain invalid calls to the EnumPrintersW() and OpenPrinter() functions. For example, passing a string of 130 or more characters in the first argument to the OpenPrinter() function results in a stack-based buffer overflow and can be leveraged to execute code in the context of the Spooler service, which runs as the privileged LocalSystem account. -- Vendor Response: Citrix has issued an update to correct this vulnerability. More details can be found at: http://support.citrix.com/article/CTX111686 -- Disclosure Timeline: 2005.07.07 - Pre-exiting Digital Vaccine released to TippingPoint customers 2006.10.02 - Vulnerability reported to vendor 2007.01.24 - Coordinated public release of advisory -- Credit: This vulnerability was discovered by an anonymous researcher. -- About the Zero Day Initiative (ZDI): Established by TippingPoint, a division of 3Com, The Zero Day Initiative (ZDI) represents a best-of-breed model for rewarding security researchers for responsibly disclosing discovered vulnerabilities. Researchers interested in getting paid for their security research through the ZDI can find more information and sign-up at: http://www.zerodayinitiative.com The ZDI is unique in how the acquired vulnerability information is used. 3Com does not re-sell the vulnerability details or any exploit code. Instead, upon notifying the affected product vendor, 3Com provides its customers with zero day protection through its intrusion prevention technology. Explicit details regarding the specifics of the vulnerability are not exposed to any parties until an official vendor patch is publicly available. Furthermore, with the altruistic aim of helping to secure a broader user base, 3Com provides this vulnerability information confidentially to security vendors (including competitors) who have a vulnerability protection or mitigation product.
Powered by blists - more mailing lists