Integer underflow in the unlzw function in unlzw.c in gzip before 1.4 on 64-bit platforms, as used in ncompress and probably others, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted archive that uses LZW compression, leading to an array index error.

The remote VMware ESX / ESXi host is missing a security-related patch.
It is, therefore, affected by multiple vulnerabilities, including remote code execution vulnerabilities, in several components and third-party libraries :

  - libpng
  - VMnc Codec
  - vmrun
  - VMware Remote Console (VMrc)
  - VMware Tools
  - vmware-authd

The remote host is affected by the vulnerability described in GLSA-201412-08 (Multiple packages, Multiple vulnerabilities fixed in 2010)

    Vulnerabilities have been discovered in the packages listed below.
      Please review the CVE identifiers in the Reference section for details.
      Insight       Perl Tk Module       Source-Navigator       Tk       Partimage       Mlmmj       acl       Xinit       gzip       ncompress       liblzw       splashutils       GNU M4       KDE Display Manager       GTK+       KGet       dvipng       Beanstalk       Policy Mount       pam_krb5       GNU gv       LFTP       Uzbl       Slim       Bitdefender Console       iputils       DVBStreamer   Impact :

    A context-dependent attacker may be able to gain escalated privileges,       execute arbitrary code, cause Denial of Service, obtain sensitive       information, or otherwise bypass security restrictions.
  Workaround :

    There are no known workarounds at this time.

From Red Hat Security Advisory 2010:0061 :

An updated gzip package that fixes one security issue is now available for Red Hat Enterprise Linux 3, 4, and 5.

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

The gzip package provides the GNU gzip data compression program.

An integer underflow flaw, leading to an array index error, was found in the way gzip expanded archive files compressed with the Lempel-Ziv-Welch (LZW) compression algorithm. If a victim expanded a specially crafted archive, it could cause gzip to crash or, potentially, execute arbitrary code with the privileges of the user running gzip. This flaw only affects 64-bit systems. (CVE-2010-0001)

Red Hat would like to thank Aki Helin of the Oulu University Secure Programming Group for responsibly reporting this flaw.

Users of gzip should upgrade to this updated package, which contains a backported patch to correct this issue.

CVE-2010-0001 gzip: (64 bit) Integer underflow by decompressing LZW format files

An integer underflow flaw, leading to an array index error, was found in the way gzip expanded archive files compressed with the Lempel-Ziv-Welch (LZW) compression algorithm. If a victim expanded a specially crafted archive, it could cause gzip to crash or, potentially, execute arbitrary code with the privileges of the user running gzip. This flaw only affects 64-bit systems. (CVE-2010-0001)

A vulnerability has been found and corrected in ncompress :

An integer underflow leading to array index error was found in the way gzip used to decompress files / archives, compressed with the Lempel-Ziv-Welch (LZW) compression algorithm. A remote attacker could provide a specially crafted LZW compressed gzip archive, which once decompressed by a local, unsuspecting user would lead to gzip crash, or, potentially to arbitrary code execution with the privileges of the user running gzip (CVE-2010-0001).

The updated packages have been upgraded to the 4.2.4.4 version which is not vulnerable to this issue.

Versions of Mac OS X 10.6 earlier than 10.6.5 are potentially affected by multiple vulnerabilities.  Mac OS X 10.6.5 contains security fixes for the following products :

  - AFP Server

  - Apache mod_perl

  - Apache

  - AppKit

  - ATS

  - CFNetwork

  - CoreGraphics

  - CoreText

  - CUPS

  - Directory Services

  - diskdev_cmds

Disk Images

  - Flash Player plug-in

  - gzip

  - Image Capture

  - ImageIO

  - Image RAW

  - Kernel

  - MySQL

  - neon

  - Networking

  - OpenLDAP

  - OpenSSL

  - Password Server

  - PHP

  - Printing

  - python

  - QuickLook

  - QuickTime

  - Safari RSS

  - Time Machine

  - Wiki Server

  - X11

  - xar

The remote host is running a version of Mac OS X 10.6.x that is prior to 10.6.5.

Mac OS X 10.6.5 contains security fixes for the following products :

  - AFP Server
  - Apache mod_perl
  - Apache
  - AppKit
  - ATS
  - CFNetwork
  - CoreGraphics
  - CoreText
  - CUPS
  - Directory Services
  - diskdev_cmds
  - Disk Images
  - Flash Player plug-in
  - gzip
  - Image Capture
  - ImageIO
  - Image RAW
  - Kernel
  - MySQL
  - neon
  - Networking
  - OpenLDAP
  - OpenSSL
  - Password Server
  - PHP
  - Printing
  - python
  - QuickLook
  - QuickTime
  - Safari RSS
  - Time Machine
  - Wiki Server
  - X11
  - xar

The following bug has been fixed :

Specially crafted gzip archives could trigger integer overflows.
Attackers could exploit that to crash gzip or potentially execute arbitrary code (CVE-2010-0001). Only 64bit architectures are affected by this flaw.

Aki Helin discovered an integer underflow in ncompress, the original Lempel-Ziv compress/uncompress programs. This could lead to the execution of arbitrary code when trying to decompress a crafted LZW compressed gzip archive.

This update fixes CVE-2009-2624 and CVE-2010-0001 vulnerabilities.

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

a. Service Console update for COS kernel

   Updated COS package 'kernel' addresses the security issues that are    fixed through versions 2.6.18-164.11.1.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2009-2695, CVE-2009-2908, CVE-2009-3228,    CVE-2009-3286, CVE-2009-3547, CVE-2009-3613 to the security issues    fixed in kernel 2.6.18-164.6.1

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2009-3612, CVE-2009-3620, CVE-2009-3621,    CVE-2009-3726 to the security issues fixed in kernel 2.6.18-164.9.1.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2007-4567, CVE-2009-4536, CVE-2009-4537,    CVE-2009-4538 to the security issues fixed in kernel 2.6.18-164.10.1

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2006-6304, CVE-2009-2910, CVE-2009-3080,    CVE-2009-3556, CVE-2009-3889, CVE-2009-3939, CVE-2009-4020,    CVE-2009-4021, CVE-2009-4138, CVE-2009-4141, and CVE-2009-4272 to    the security issues fixed in kernel 2.6.18-164.11.1.

b. ESXi userworld update for ntp

   The Network Time Protocol (NTP) is used to synchronize the time of    a computer client or server to another server or reference time    source.

   A vulnerability in ntpd could allow a remote attacker to cause a    denial of service (CPU and bandwidth consumption) by using    MODE_PRIVATE to send a spoofed (1) request or (2) response packet    that triggers a continuous exchange of MODE_PRIVATE error responses    between two NTP daemons.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-3563 to this issue.

c. Service Console package openssl updated to 0.9.8e-12.el5_4.1

   OpenSSL is a toolkit implementing SSL v2/v3 and TLS protocols with    full-strength cryptography world-wide.

   A memory leak in the zlib could allow a remote attacker to cause a    denial of service (memory consumption) via vectors that trigger    incorrect calls to the CRYPTO_cleanup_all_ex_data function.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-4355 to this issue.

   A vulnerability was discovered which may allow remote attackers to    spoof certificates by using MD2 design flaws to generate a hash    collision in less than brute-force time. NOTE: the scope of this    issue is currently limited because the amount of computation    required is still large.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-2409 to this issue.

   This update also includes security fixes that were first addressed    in version openssl-0.9.8e-12.el5.i386.rpm.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the names CVE-2009-0590, CVE-2009-1377, CVE-2009-1378,    CVE-2009-1379, CVE-2009-1386 and CVE-2009-1387 to these issues.

d. Service Console update for krb5 to 1.6.1-36.el5_4.1 and pam_krb5 to    2.2.14-15.

   Kerberos is a network authentication protocol. It is designed to    provide strong authentication for client/server applications by    using secret-key cryptography.

   Multiple integer underflows in the AES and RC4 functionality in the    crypto library could allow remote attackers to cause a denial of    service (daemon crash) or possibly execute arbitrary code by    providing ciphertext with a length that is too short to be valid.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-4212 to this issue.

   The service console package for pam_krb5 is updated to version    pam_krb5-2.2.14-15. This update fixes a flaw found in pam_krb5. In    some non-default configurations (specifically, where pam_krb5 would    be the first module to prompt for a password), a remote attacker    could use this flaw to recognize valid usernames, which would aid a    dictionary-based password guess attack.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-1384 to this issue.

e. Service Console package bind updated to 9.3.6-4.P1.el5_4.2

   BIND (Berkeley Internet Name Daemon) is by far the most widely used    Domain Name System (DNS) software on the Internet.

   A vulnerability was discovered which could allow remote attacker to    add the Authenticated Data (AD) flag to a forged NXDOMAIN response    for an existing domain.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2010-0097 to this issue.

   A vulnerability was discovered which could allow remote attackers    to conduct DNS cache poisoning attacks by receiving a recursive    client query and sending a response that contains CNAME or DNAME    records, which do not have the intended validation before caching.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2010-0290 to this issue.

   A vulnerability was found in the way that bind handles out-of-    bailiwick data accompanying a secure response without re-fetching    from the original source, which could allow remote attackers to    have an unspecified impact via a crafted response.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2010-0382 to this issue.

   NOTE: ESX does not use the BIND name service daemon by default.

f. Service Console package gcc updated to 3.2.3-60

   The GNU Compiler Collection includes front ends for C, C++,    Objective-C, Fortran, Java, and Ada, as well as libraries for these    languages

   GNU Libtool's ltdl.c attempts to open .la library files in the    current working directory.  This could allow a local user to gain    privileges via a Trojan horse file.  The GNU C Compiler collection    (gcc) provided in ESX contains a statically linked version of the    vulnerable code, and is being replaced.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2009-3736 to this issue.

g. Service Console package gzip update to 1.3.3-15.rhel3

   gzip is a software application used for file compression

   An integer underflow in gzip's unlzw function on 64-bit platforms    may allow a remote attacker to trigger an array index error    leading to a denial of service (application crash) or possibly    execute arbitrary code via a crafted LZW compressed file.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2010-0001 to this issue.

h. Service Console package sudo updated to 1.6.9p17-6.el5_4

   Sudo (su 'do') allows a system administrator to delegate authority    to give certain users (or groups of users) the ability to run some    (or all) commands as root or another user while providing an audit    trail of the commands and their arguments.

   When a pseudo-command is enabled, sudo permits a match between the    name of the pseudo-command and the name of an executable file in an    arbitrary directory, which allows local users to gain privileges    via a crafted executable file.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2010-0426 to this issue.

   When the runas_default option is used, sudo does not properly set    group memberships, which allows local users to gain privileges via    a sudo command.

   The Common Vulnerabilities and Exposures Project (cve.mitre.org)    has assigned the name CVE-2010-0427 to this issue.

New gzip packages are available for Slackware 13.0 (64-bit) and
-current to fix a security issue.

Several vulnerabilities have been found in gzip, the GNU compression utilities. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-2624     Thiemo Nagel discovered a missing input sanitation flaw     in the way gzip used to decompress data blocks for     dynamic Huffman codes, which could lead to the execution     of arbitrary code when trying to decompress a crafted     archive. This issue is a reappearance of CVE-2006-4334     and only affects the lenny version.

  - CVE-2010-0001     Aki Helin discovered an integer underflow when     decompressing files that are compressed using the LZW     algorithm. This could lead to the execution of arbitrary     code when trying to decompress a crafted LZW compressed     gzip archive.

The following bugs have been fixed :

  - Specially crafted gzip archives could lead to gzip     allocating a too small huffman table. Attackers could     exploit that to crash gzip (CVE-2009-2624). Specially     crafted gzip archives could trigger integer overflows.
    Attackers could exploit that to crash gzip or     potentially execute arbitrary code (CVE-2010-0001). Only     64bit architectures are affected by this flaw.

Specially crafted gzip archives could lead to gzip allocating a too small huffman table. Attackers could exploit that to crash gzip (CVE-2009-2624).

Specially crafted gzip archives could trigger integer overflows.
Attackers could exploit that to crash gzip or potentially execute arbitrary code (CVE-2010-0001). Only 64bit architectures are affected by this flaw.

The following bug has been fixed :

  - Specially crafted gzip archives could trigger integer     overflows. Attackers could exploit that to crash gzip or     potentially execute arbitrary code. (CVE-2010-0001) Only     64bit architectures are affected by this flaw.

It was discovered that gzip incorrectly handled certain malformed compressed files. If a user or automated system were tricked into opening a specially crafted gzip file, an attacker could cause gzip to crash or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2009-2624)

Aki Helin discovered that gzip incorrectly handled certain malformed files compressed with the Lempel-Ziv-Welch (LZW) algorithm. If a user or automated system were tricked into opening a specially crafted gzip file, an attacker could cause gzip to crash or possibly execute arbitrary code with the privileges of the user invoking the program.
(CVE-2010-0001).

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.

An updated gzip package that fixes one security issue is now available for Red Hat Enterprise Linux 3, 4, and 5.

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

The gzip package provides the GNU gzip data compression program.

An integer underflow flaw, leading to an array index error, was found in the way gzip expanded archive files compressed with the Lempel-Ziv-Welch (LZW) compression algorithm. If a victim expanded a specially crafted archive, it could cause gzip to crash or, potentially, execute arbitrary code with the privileges of the user running gzip. This flaw only affects 64-bit systems. (CVE-2010-0001)

Red Hat would like to thank Aki Helin of the Oulu University Secure Programming Group for responsibly reporting this flaw.

Users of gzip should upgrade to this updated package, which contains a backported patch to correct this issue.

Multiple vulnerabilities has been found and corrected in gzip :

A missing input sanitation flaw was found in the way gzip used to decompress data blocks for dynamic Huffman codes. A remote attacker could provide a specially crafted gzip compressed data archive, which once opened by a local, unsuspecting user would lead to denial of service (gzip crash) or, potentially, to arbitrary code execution with the privileges of the user running gzip (CVE-2009-2624).

An integer underflow leading to array index error was found in the way gzip used to decompress files / archives, compressed with the Lempel-Ziv-Welch (LZW) compression algorithm. A remote attacker could provide a specially crafted LZW compressed gzip archive, which once decompressed by a local, unsuspecting user would lead to gzip crash, or, potentially to arbitrary code execution with the privileges of the user running gzip (CVE-2010-0001).

Packages for 2008.0 are provided for Corporate Desktop 2008.0 customers.

The updated packages have been patched to correct these issues.

ID	Name	Product	Family	Severity
89740	VMware ESX / ESXi Third-Party Libraries and Components (VMSA-2010-0009) (remote check)	Nessus	VMware ESX Local Security Checks	critical
79961	GLSA-201412-08 : Multiple packages, Multiple vulnerabilities fixed in 2010	Nessus	Gentoo Local Security Checks	critical
67990	Oracle Linux 3 / 4 / 5 : gzip (ELSA-2010-0061)	Nessus	Oracle Linux Local Security Checks	medium
60727	Scientific Linux Security Update : gzip on SL3.x, SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
56530	Mandriva Linux Security Advisory : ncompress (MDVSA-2011:152)	Nessus	Mandriva Local Security Checks	medium
5705	Mac OS X 10.6 < 10.6.5 Multiple Vulnerabilities	Nessus Network Monitor	Generic	critical
50548	Mac OS X 10.6.x < 10.6.5 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	critical
49857	SuSE 10 Security Update : gzip (ZYPP Patch Number 6793)	Nessus	SuSE Local Security Checks	medium
47792	Debian DSA-2074-1 : ncompress - integer underflow	Nessus	Debian Local Security Checks	medium
47203	Fedora 11 : gzip-1.3.12-10.fc11 (2010-0964)	Nessus	Fedora Local Security Checks	medium
47201	Fedora 12 : gzip-1.3.12-14.fc12 (2010-0884)	Nessus	Fedora Local Security Checks	medium
46765	VMSA-2010-0009 : ESXi ntp and ESX Service Console third-party updates	Nessus	VMware ESX Local Security Checks	high
44947	Slackware 13.0 / current : gzip (SSA:2010-060-03)	Nessus	Slackware Local Security Checks	medium
44839	Debian DSA-1974-1 : gzip - several vulnerabilities	Nessus	Debian Local Security Checks	medium
44313	SuSE 10 Security Update : gzip (ZYPP Patch Number 6792)	Nessus	SuSE Local Security Checks	medium
44312	SuSE 11 Security Update : gzip (SAT Patch Number 1839)	Nessus	SuSE Local Security Checks	medium
44310	openSUSE Security Update : gzip (gzip-1838)	Nessus	SuSE Local Security Checks	medium
44308	openSUSE Security Update : gzip (gzip-1838)	Nessus	SuSE Local Security Checks	medium
44306	openSUSE Security Update : gzip (gzip-1838)	Nessus	SuSE Local Security Checks	medium
44304	SuSE9 Security Update : gzip (YOU Patch Number 12573)	Nessus	SuSE Local Security Checks	medium
44107	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 / 9.10 : gzip vulnerabilities (USN-889-1)	Nessus	Ubuntu Local Security Checks	medium
44104	RHEL 3 / 4 / 5 : gzip (RHSA-2010:0061)	Nessus	Red Hat Local Security Checks	medium
44101	Mandriva Linux Security Advisory : gzip (MDVSA-2010:020)	Nessus	Mandriva Local Security Checks	medium
44098	CentOS 3 / 4 / 5 : gzip (CESA-2010:0061)	Nessus	CentOS Local Security Checks	medium

Detections

Analytics

CVE-2010-0001

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