Ubuntu 4.10 / 5.04 : zlib vulnerability (USN-148-1)

High Nessus Plugin ID 20543


The remote Ubuntu host is missing one or more security-related patches.


Tavis Ormandy discovered that zlib did not properly verify data streams. Decompressing certain invalid compressed files caused corruption of internal data structures, which caused applications which link to zlib to crash. Specially crafted input might even have allowed arbitrary code execution.

zlib is used by hundreds of server and client applications, so this vulnerability could be exploited to cause Denial of Service attacks to almost all services provided by an Ubuntu system.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected zlib-bin, zlib1g and / or zlib1g-dev packages.

Plugin Details

Severity: High

ID: 20543

File Name: ubuntu_USN-148-1.nasl

Version: 1.14

Type: local

Agent: unix

Published: 2006/01/15

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:zlib-bin, p-cpe:/a:canonical:ubuntu_linux:zlib1g, p-cpe:/a:canonical:ubuntu_linux:zlib1g-dev, cpe:/o:canonical:ubuntu_linux:4.10, cpe:/o:canonical:ubuntu_linux:5.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 2005/07/06

Reference Information

CVE: CVE-2005-2096

USN: 148-1