RHEL 4 : zlib (RHSA-2005:569)

High Nessus Plugin ID 18635


The remote Red Hat host is missing one or more security updates.


Updated Zlib packages that fix a buffer overflow are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

Zlib is a general-purpose lossless data compression library which is used by many different programs.

Tavis Ormandy discovered a buffer overflow affecting Zlib version 1.2 and above. An attacker could create a carefully crafted compressed stream that would cause an application to crash if the stream is opened by a user. As an example, an attacker could create a malicious PNG image file which would cause a web browser or mail viewer to crash if the image is viewed. The Common Vulnerabilities and Exposures project assigned the name CVE-2005-2096 to this issue.

Please note that the versions of Zlib as shipped with Red Hat Enterprise Linux 2.1 and 3 are not vulnerable to this issue.

All users should update to these erratum packages which contain a patch from Mark Adler which corrects this issue.


Update the affected zlib and / or zlib-devel packages.

See Also



Plugin Details

Severity: High

ID: 18635

File Name: redhat-RHSA-2005-569.nasl

Version: $Revision: 1.17 $

Type: local

Agent: unix

Published: 2005/07/06

Modified: 2016/12/28

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:zlib, p-cpe:/a:redhat:enterprise_linux:zlib-devel, cpe:/o:redhat:enterprise_linux:4

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Patch Publication Date: 2005/07/06

Vulnerability Publication Date: 2005/07/07

Reference Information

CVE: CVE-2005-2096

OSVDB: 17827

RHSA: 2005:569