(Vendor Issues Fix) Zlib Error Handling Bug in inflate() and inflateBack() Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1012055 |
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SecurityTracker URL: http://securitytracker.com/id/1012055
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CVE Reference:
CAN-2004-0797
(Links to External Site)
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Date: Nov 3 2004
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Impact:
Denial of service via local system, Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 1.2 - 1.2.1
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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.
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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.
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Solution:
The vendor has issued a fixed version (1.2.2), available at:
http://www.zlib.net/
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Vendor URL: www.gzip.org/zlib/ (Links to External Site)
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Cause:
Exception handling error
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Underlying OS:
Linux (Any), UNIX (Any)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 1 Nov 2004 20:32:08 -0800
Subject: zlib 1.2.2 released
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(List moderators -- in the previous version of this email I sent you, I
forgot to include a link to the vulnerability, corrected below.)
Security guardians,
zlib 1.2.2 has been released, which remedies a vulnerability to a
denial-of-service attack ( http://www.kb.cert.org/vuls/id/238678 ).
You can get the latest release here:
http://www.zlib.net/
Note that the "canonical" zlib site at http://www.zlib.org/ has yet to
be updated by the owner, Jean-loup Gailly, and still shows zlib 1.2.1.
You should go to the above site for the latest release. My gpg
signature on the zlib-1.2.2.tar.gz is attached below.
Mark Adler
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