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[ GLSA 200507-19 ] zlib: Buffer overflow
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GLSA
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Joined: 12 May 2004
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PostPosted: Fri Jul 22, 2005 6:04 am    Post subject: [ GLSA 200507-19 ] zlib: Buffer overflow Reply with quote

Gentoo Linux Security Advisory

Title: zlib: Buffer overflow (GLSA 200507-19)
Severity: high
Exploitable: remote
Date: July 22, 2005
Bug(s): #99751
ID: 200507-19

Synopsis

zlib is vulnerable to a buffer overflow which could potentially lead to execution of arbitrary code.

Background

zlib is a widely used free and patent unencumbered data compression library.

Affected Packages

Package: sys-libs/zlib
Vulnerable: < 1.2.3
Unaffected: >= 1.2.3
Architectures: All supported architectures


Description

zlib improperly handles invalid data streams which could lead to a buffer overflow.

Impact

By creating a specially crafted compressed data stream, attackers can overwrite data structures for applications that use zlib, resulting in arbitrary code execution or a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All zlib users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.3"


References

Full Disclosure Announcement
CAN-2005-1849


Last edited by GLSA on Sun May 07, 2006 4:58 pm; edited 1 time in total
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