TZipBuilder ZIP File Handling Buffer OverflowVulnerability

2006.05.09
Risk: Medium
Local: No
Remote: Yes
CWE: N/A


CVSS Base Score: 5.1/10
Impact Subscore: 6.4/10
Exploitability Subscore: 4.9/10
Exploit range: Remote
Attack complexity: High
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

====================================================================== Secunia Research 08/05/2006 - TZipBuilder ZIP File Handling Buffer Overflow Vulnerability - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Description of Vulnerability.........................................3 Solution.............................................................4 Time Table...........................................................5 Credits..............................................................6 References...........................................................7 About Secunia........................................................8 Verification.........................................................9 ====================================================================== 1) Affected Software * TZipBuilder 1.79.03.01. Prior versions may also be affected. ====================================================================== 2) Severity Rating: Moderately Critical Impact: System Access Where: Remote ====================================================================== 3) Description of Vulnerability Secunia Research has discovered a vulnerability in TZipBuilder, which can be exploited by malicious people to compromise a user's system. The vulnerability is caused due to a boundary error when listing the contents of a ZIP archive that contains a file with an overly long filename. This can be exploited to cause a stack-based buffer overflow when a specially crafted ZIP archive is opened. Successful exploitation allows execution of arbitrary code with the privileges of an application that uses the library. ====================================================================== 4) Solution Update to version 1.79.04.00. http://www.drehoeksw.net/ZipBuild2.html ====================================================================== 5) Time Table 03/05/2006 - Initial vendor notification. 03/05/2006 - Initial vendor reply. 08/05/2006 - Public disclosure. ====================================================================== 6) Credits Discovered by Tan Chew Keong, Secunia Research. ====================================================================== 7) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2006-2161 for the vulnerability. ====================================================================== 8) About Secunia Secunia collects, validates, assesses, and writes advisories regarding all the latest software vulnerabilities disclosed to the public. These advisories are gathered in a publicly available database at the Secunia website: http://secunia.com/ Secunia offers services to our customers enabling them to receive all relevant vulnerability information to their specific system configuration. Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/secunia_security_advisories/ ====================================================================== 9) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2006-26/advisory/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================


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