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Category:   Application (Generic)  >   Zlib Vendors:   GNU [multiple authors]
(OpenBSD Issues Fix) Zlib Error Handling Bug in inflate() and inflateBack() Lets Remote Users Deny Service
SecurityTracker Alert ID:  1011087
SecurityTracker URL:  http://securitytracker.com/id/1011087
CVE Reference:   CVE-2004-0797   (Links to External Site)
Date:  Aug 30 2004
Impact:   Denial of service via local system, Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.2 - 1.2.1
Description:   A vulnerability was reported in zlib. A remote user can cause denial of service conditions.

Johan Thelmen reported that a specially crafted file can cause a segmentation fault in zlib.

It is reported that the inflate() and inflateBack() functions do not properly handle errors.

Impact:   A user can create a file that when processed by zlib, will cause a segmentation fault. The specific impact depends on the application using zlib.
Solution:   OpenBSD has issued a patch, available at:

ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.5/common/017_libz.patch

Vendor URL:  www.gzip.org/zlib/ (Links to External Site)
Cause:   Exception handling error
Underlying OS:  UNIX (OpenBSD)
Underlying OS Comments:  3.5

Message History:   This archive entry is a follow-up to the message listed below.
Aug 30 2004 Zlib Error Handling Bug in inflate() and inflateBack() Lets Remote Users Deny Service



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