FreeBSD : zlib -- buffer overflow vulnerability (837b9fb2-0595-11da-86bc-000e0c2e438a)

Medium Nessus Plugin ID 21460


The remote FreeBSD host is missing a security-related update.


Problem description A fixed-size buffer is used in the decompression of data streams. Due to erronous analysis performed when zlib was written, this buffer, which was belived to be sufficiently large to handle any possible input stream, is in fact too small. Impact A carefully constructed compressed data stream can result in zlib overwriting some data structures. This may cause applications to halt, resulting in a denial of service; or it may result in an attacker gaining elevated privileges.


Update the affected package.

See Also

Plugin Details

Severity: Medium

ID: 21460

File Name: freebsd_pkg_837b9fb2059511da86bc000e0c2e438a.nasl

Version: $Revision: 1.8 $

Type: local

Published: 2006/05/13

Modified: 2013/06/22

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:linux_base-suse, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2005/08/05

Vulnerability Publication Date: 2005/07/27

Reference Information

CVE: CVE-2005-1849

OSVDB: 18141

FreeBSD: SA-05:18.zlib