Buffer overflow in the ReadImage function in generic/tkImgGIF.c in Tcl (Tcl/Tk) 8.4.13 through 8.4.15 allows remote attackers to execute arbitrary code via multi-frame interlaced GIF files in which later frames are smaller than the first. NOTE: this issue is due to an incorrect patch for CVE-2007-5378.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2008-0136 advisory.

    [8.4.13-5.EL5_1.1]
     - CVE-2008-0553 CVE-2007-5378
     - GIF overflow and also GIF overflow      Resolves: rhbz#432514

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An input validation flaw was discovered in Tk's GIF image handling. A code-size value read from a GIF image was not properly validated before being used, leading to a buffer overflow. A specially crafted GIF file could use this to cause a crash or, potentially, execute code with the privileges of the application using the Tk graphical toolkit.
(CVE-2008-0553)

A buffer overflow flaw was discovered in Tk's animated GIF image handling. An animated GIF containing an initial image smaller than subsequent images could cause a crash or, potentially, execute code with the privileges of the application using the Tk library.
(CVE-2007-5137)

A buffer overflow flaw was discovered in Tk's animated GIF image handling. An animated GIF containing an initial image smaller than subsequent images could cause a crash or, potentially, execute code with the privileges of the application using the Tk library.
(CVE-2007-5378)

This update fixes a buffer overflow that occurs while processing interlaced/animatedGIF images. (CVE-2007-4851) This bug could be used to execute code remotely.

a. VMware Tools Local Privilege Escalation on Windows-based guest OS

   The VMware Tools Package provides support required for shared folders    (HGFS) and other features.

   An input validation error is present in the Windows-based VMware    HGFS.sys driver.   Exploitation of this flaw might result in    arbitrary code execution on the guest system by an unprivileged    guest user.  It doesn't matter on what host the Windows guest OS    is running, as this is a guest driver vulnerability and not a    vulnerability on the host.

   The HGFS.sys driver is present in the guest operating system if the    VMware Tools package is loaded.  Even if the host has HGFS disabled    and has no shared folders, Windows-based guests may be affected. This    is regardless if a host supports HGFS.

   This issue could be mitigated by removing the VMware Tools package    from Windows based guests.  However this is not recommended as it    would impact usability of the product.

   NOTE: Installing the new hosted release or ESX patches will not          remediate the issue.  The VMware Tools packages will need          to be updated on each Windows-based guest followed by a          reboot of the guest system.

   VMware would like to thank iDefense and Stephen Fewer of Harmony    Security for reporting this issue to us.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2007-5671 to this issue.

b. Privilege escalation on ESX or Linux based hosted operating systems

   This update fixes a security issue related to local exploitation of    an untrusted library path vulnerability in vmware-authd. In order to    exploit this vulnerability, an attacker must have local access and    the ability to execute the set-uid vmware-authd binary on an affected    system. Exploitation of this flaw might result in arbitrary code    execution on the Linux host system by an unprivileged user.

   VMware would like to thank iDefense for reporting this issue to us.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2008-0967 to this issue.

c. Openwsman Invalid Content-Length Vulnerability

   Openwsman is a system management platform that implements the Web    Services Management protocol (WS-Management). It is installed and    running by default. It is used in the VMware Management Service    Console and in ESXi.

   The openwsman management service on ESX 3.5 and ESXi 3.5 is vulnerable    to a privilege escalation vulnerability, which may allow users with    non-privileged ESX or Virtual Center accounts to gain root privileges.

   To exploit this vulnerability, an attacker would need a local ESX    account or a VirtualCenter account with the Host.Cim.CimInteraction    permission.

   Systems with no local ESX accounts and no VirtualCenter accounts with    the Host.Cim.CimInteraction permission are not vulnerable.

   This vulnerability cannot be exploited by users without valid login    credentials.

   Discovery: Alexander Sotirov, VMware Security Research

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2008-2097 to this issue.

d. VMware VIX Application Programming Interface (API) Memory Overflow    Vulnerabilities

   The VIX API (also known as 'Vix') is an API that lets users write scripts    and programs to manipulate virtual machines.

   Multiple buffer overflow vulnerabilities are present in the VIX API.
   Exploitation of these vulnerabilities might result in a privilege    escalation on the host system. This exploit scenario is relevant for all    affected products. On VC, ESX30x, and ESX35, users need to have the VM    Interaction Privilege in order to exploit the vulnerability.

   Exploitation of these vulnerabilities might also result in code execution on    the host system from the guest system or on the service console in ESX Server    from the guest operating system. This exploit scenario is relevant for    Workstation 6.0.x (version 6.0.3 and below), Player 2.0.x (version 2.0.3 and    below), ACE 2.0.x (version 2.0.3 and below), Server 1.0.x (version 1.0.5 and    below), and ESX3.5. The parameter 'vix.inGuest.enable' in the VMware    configuration file must be set to true to allow for exploitation on these    products. Note that the parameter 'vix-inGuest.enable' is set to false by    default.

   The parameter 'vix.inGuest.enable' is present in the    following products :

     VMware Workstation 6.0.2 and higher      VMware ACE 6.0.2 and higher      VMware Server 1.06 and higher      VMware Fusion 1.1.2 and higher      ESX Server 3.0 and higher      ESX Server 3.5 and higher

   In previous versions of VMware products where the VIX API was introduced,    the VIX API couldn't be disabled.

   This vulnerability is present in ESX and the hosted products even if you    have not installed the VIX API. To patch your system you will need to    update to the new hosted product version or to apply the appropriate ESX    patch. It is not necessary to update the VIX API if you have installed    the VIX API.

   VMware would like to thank Andrew Honig of the Department of    Defense for reporting this issue.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2008-2100 to this issue.

II Service Console rpm updates

 NOTE: ESXi and hosted products are not affected by any service console        security updates

 a. Security update for cyrus-sasl

   Updated cyrus-sasl package for the ESX Service Console corrects a security    issue found in the DIGEST-MD5 authentication mechanism of Cyrus'    implementation of Simple Authentication and Security Layer (SASL). As a    result of this issue in the authentication mechanism, a remote    unauthenticated attacker might be able to cause a denial of service error    on the service console.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2006-1721 to this issue.

 b. Security update for tcltk

   An input validation flaw was discovered in Tk's GIF image handling. A    code-size value read from a GIF image was not properly validated before    being used, leading to a buffer overflow. A specially crafted GIF file    could use this to cause a crash or, potentially, execute code with the    privileges of the application using the Tk graphical toolkit.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2008-0553 to this issue.

   A buffer overflow flaw was discovered in Tk's animated GIF image handling.
   An animated GIF containing an initial image smaller than subsequent images    could cause a crash or, potentially, execute code with the privileges of    the application using the Tk library.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2007-5378 to this issue.

   A flaw first discovered in the Tcl regular expression engine used in the    PostgreSQL database server, resulted in an infinite loop when processing    certain regular expressions.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2007-4772 to this issue.

 c. Security update for unzip

   This patch includes a moderate security update to the service console that    fixes a flaw in unzip. An attacker could execute malicious code with a    user's privileges if the user ran unzip on a file designed to leverage    this flaw.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2008-0888 to this issue.

 d. Security update for krb5

   KDC in MIT Kerberos 5 (krb5kdc) does not set a global variable    for some krb4 message types, which allows remote attackers to    cause a denial of service (crash) and possibly execute arbitrary    code via crafted messages that trigger a NULL pointer dereference    or double-free.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2008-0062 to this issue.

   NOTE: ESX doesn't contain the krb5kdc binary and is not vulnerable          to this issue.

   The Kerberos 4 support in KDC in MIT Kerberos 5 (krb5kdc) does not    properly clear the unused portion of a buffer when generating an    error message, which might allow remote attackers to obtain    sensitive information, aka 'Uninitialized stack values.'

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2008-0063 to this issue.

   NOTE: ESX doesn't contain the krb5kdc binary and is not vulnerable          to this issue.

   Buffer overflow in the RPC library (lib/rpc/rpc_dtablesize.c) used    by libgssrpc and kadmind in MIT Kerberos 5 (krb5) 1.2.2, and probably    other versions before 1.3, when running on systems whose unistd.h    does not define the FD_SETSIZE macro, allows remote attackers to cause    a denial of service (crash) and possibly execute arbitrary code by    triggering a large number of open file descriptors.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2008-0948 to this issue.

The ReadImage() function in Tk did not check codeSize read from GIF images prior to initializing the append array, which could lead to a buffer overflow with unknown impact.

The updated packages have been patched to correct this issue.

Two buffer overflows have been found in the GIF image parsing code of Tk, a cross-platform graphical toolkit, which could lead to the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2007-5137     It was discovered that libtk-img is prone to a buffer     overflow via specially crafted multi-frame interlaced     GIF files.

  - CVE-2007-5378     It was discovered that libtk-img is prone to a buffer     overflow via specially crafted GIF files with certain     subimage sizes.

Updated tk packages that fix a security issue are now available for Red Hat Enterprise Linux 5.

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

Tk is a graphical toolkit for the Tcl scripting language.

An input validation flaw was discovered in Tk's GIF image handling. A code-size value read from a GIF image was not properly validated before being used, leading to a buffer overflow. A specially crafted GIF file could use this to cause a crash or, potentially, execute code with the privileges of the application using the Tk graphical toolkit.
(CVE-2008-0553)

A buffer overflow flaw was discovered in Tk's animated GIF image handling. An animated GIF containing an initial image smaller than subsequent images could cause a crash or, potentially, execute code with the privileges of the application using the Tk library.
(CVE-2007-5137)

All users are advised to upgrade to these updated packages which contain a backported patches to resolve these issues.

It was discovered that Tk, a cross-platform graphical toolkit for Tcl, performs insufficient input validation in the code used to load GIF images, which may lead to the execution of arbitrary code.

Due to the technical limitation in the Debian archive scripts the update for the old stable distribution (sarge) cannot be released in sync with the update for the stable distribution. It will be provided in the next days.

It was discovered that Tk, a cross-platform graphical toolkit for Tcl, performs insufficient input validation in the code used to load GIF images, which may lead to the execution of arbitrary code.

It was discovered that Tk could be made to overrun a buffer when loading certain images. If a user were tricked into opening a specially crafted GIF image, remote attackers could cause a denial of service or execute arbitrary code with user privileges.

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.

Buffer overflow in the ReadImage function in generic/tkImgGIF.c in Tcl (Tcl/Tk) before 8.4.16 allows remote attackers to execute arbitrary code via multi-frame interlaced GIF files in which later frames are smaller than the first.

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 vulnerability in Tk was found that could be used to overrun a buffer when loading certain GIF images. If a user were tricked into opening a specially crafted GIF file, it could lead to a denial of service condition or possibly the execution of arbitrary code with the user's privileges.

Updated packages have been patched to prevent this issue.

The remote host is affected by the vulnerability described in GLSA-200710-07 (Tk: Buffer overflow)

    Reinhard Max discovered a boundary error in Tk when processing an     interlaced GIF with two frames where the second is smaller than the     first one.
  Impact :

    A remote attacker could entice a user to open a specially crafted GIF     image with a Tk-based software, possibly resulting in the execution of     arbitrary code with the privileges of the user running the application.
  Workaround :

    There is no known workaround at this time.

A Buffer overflow in the ReadImage function in generic/tkImgGIF.c in Tcl/Tk, allows remote attackers to execute arbitrary code via multi-frame interlaced GIF files in which later frames are smaller than the first.

ID	Name	Product	Family	Type	Severity
67655	Oracle Linux 5 : Moderate: / tk (ELSA-2008-0136)	Nessus	Oracle Linux Local Security Checks	Local	critical
60363	Scientific Linux Security Update : tk on SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	Local	medium
41156	SuSE9 Security Update : Tk (YOU Patch Number 11853)	Nessus	SuSE Local Security Checks	Local	medium
40378	VMSA-2008-0009 : Updates to VMware Workstation, VMware Player, VMware ACE, VMware Fusion, VMware Server, VMware VIX API, VMware ESX, VMware ESXi resolve critical security issues	Nessus	VMware ESX Local Security Checks	Local	high
36297	Mandriva Linux Security Advisory : tk (MDVSA-2008:041)	Nessus	Mandriva Local Security Checks	Local	medium
35932	Debian DSA-1743-1 : libtk-img - buffer overflows	Nessus	Debian Local Security Checks	Local	medium
31162	RHEL 5 : tk (RHSA-2008:0136)	Nessus	Red Hat Local Security Checks	Local	medium
31141	CentOS 5 : tk (CESA-2008:0136)	Nessus	CentOS Local Security Checks	Local	medium
29590	SuSE 10 Security Update : Tk (ZYPP Patch Number 4478)	Nessus	SuSE Local Security Checks	Local	medium
28339	Debian DSA-1416-1 : tk8.3 - buffer overflow	Nessus	Debian Local Security Checks	Local	medium
28338	Debian DSA-1415-1 : tk8.4 - buffer overflow	Nessus	Debian Local Security Checks	Local	medium
28134	Ubuntu 6.06 LTS / 6.10 / 7.04 : tk8.3, tk8.4 vulnerability (USN-529-1)	Nessus	Ubuntu Local Security Checks	Local	medium
27778	Fedora 7 : tk-8.4.13-6.fc7 (2007-2564)	Nessus	Fedora Local Security Checks	Local	medium
27519	Mandrake Linux Security Advisory : tk (MDKSA-2007:200)	Nessus	Mandriva Local Security Checks	Local	medium
27469	openSUSE 10 Security Update : tk (tk-4480)	Nessus	SuSE Local Security Checks	Local	medium
26947	GLSA-200710-07 : Tk: Buffer overflow	Nessus	Gentoo Local Security Checks	Local	medium
26938	FreeBSD : tcl/tk -- buffer overflow in ReadImage function (a058d6fa-7325-11dc-ae10-0016179b2dd5)	Nessus	FreeBSD Local Security Checks	Local	medium

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CVE-2007-5137

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