Integer overflow in X.org libxcb 1.9 and earlier allows X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to the read_packet function.

The version of Oracle Secure Global Desktop installed on the remote host is 4.63, 4.71, or 5.2 and is missing a security patch from the July 2016 Critical Patch Update (CPU). It is, therefore, affected by the following vulnerabilities :

  - An integer overflow condition exists in the X Server     subcomponent in the read_packet() function due to     improper validation of user-supplied input when     calculating the amount of memory required to handle     returned data. A remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. Note that this vulnerability only     affects versions 4.71 and 5.2. (CVE-2013-2064)

  - A carry propagating flaw exists in the OpenSSL     subcomponent in the x86_64 Montgomery squaring     implementation that may cause the BN_mod_exp() function     to produce incorrect results. An attacker can exploit     this to obtain sensitive information regarding private     keys. (CVE-2015-3193)

  - A NULL pointer dereference flaw exists in the OpenSSL     subcomponent in file rsa_ameth.c when handling ASN.1     signatures that use the RSA PSS algorithm but are     missing a mask generation function parameter. A remote     attacker can exploit this to cause the signature     verification routine to crash, leading to a denial of     service. (CVE-2015-3194)

  - A key disclosure vulnerability exists in the OpenSSL     subcomponent due to improper handling of cache-bank     conflicts on the Intel Sandy-bridge microarchitecture.
    An attacker can exploit this to gain access to RSA key     information. (CVE-2016-0702)

  - A NULL pointer dereference flaw exists in the OpenSSL     subcomponent in the BN_hex2bn() and BN_dec2bn()     functions. A remote attacker can exploit this to trigger     a heap corruption, resulting in the execution of     arbitrary code. (CVE-2016-0797)

  - Multiple memory corruption issues exist in the OpenSSL     subcomponent that allow a remote attacker to cause a     denial of service condition or the execution of     arbitrary code. (CVE-2016-0799)

  - A heap buffer overflow condition exists in the OpenSSL     subcomponent in the EVP_EncodeUpdate() function within     file crypto/evp/encode.c that is triggered when handling     a large amount of input data. An unauthenticated, remote     attacker can exploit this to cause a denial of service     condition. (CVE-2016-2105)

  - Multiple flaws exist in the OpenSSL subcomponent in the     aesni_cbc_hmac_sha1_cipher() function in file     crypto/evp/e_aes_cbc_hmac_sha1.c and the     aesni_cbc_hmac_sha256_cipher() function in file     crypto/evp/e_aes_cbc_hmac_sha256.c that are triggered     when the connection uses an AES-CBC cipher and AES-NI     is supported by the server. A man-in-the-middle attacker     can exploit these to conduct a padding oracle attack,     resulting in the ability to decrypt the network traffic.
    (CVE-2016-2107)

  - An unspecified flaw exists in the OpenSSL subcomponent     that allows a remote attacker to execute arbitrary     code. (CVE-2016-3613)

The remote Solaris system is missing necessary patches to address security updates :

  - Integer overflow in X.org libXfixes 5.0 and earlier     allows X servers to trigger allocation of insufficient     memory and a buffer overflow via vectors related to the     XFixesGetCursorImage function. (CVE-2013-1983)

  - Multiple integer overflows in X.org libXrandr 1.4.0 and     earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) XRRQueryOutputProperty and (2)     XRRQueryProviderProperty functions. (CVE-2013-1986)

  - Multiple integer overflows in X.org libXrender 0.9.7 and     earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) XRenderQueryFilters, (2)     XRenderQueryFormats, and (3) XRenderQueryPictIndexValues     functions. (CVE-2013-1987)

  - Multiple integer overflows in X.org libXRes 1.0.6 and     earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) XResQueryClients and (2)     XResQueryClientResources functions. (CVE-2013-1988)

  - Multiple integer overflows in X.org libXv 1.0.7 and     earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) XvQueryPortAttributes, (2)     XvListImageFormats, and (3) XvCreateImage function.
    (CVE-2013-1989)

  - Multiple integer overflows in X.org libXvMC 1.0.7 and     earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) XvMCListSurfaceTypes and (2)     XvMCListSubpictureTypes functions. (CVE-2013-1990)

  - Multiple integer overflows in X.org libdmx 1.1.2 and     earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) DMXGetScreenAttributes, (2)     DMXGetWindowAttributes, and (3) DMXGetInputAttributes     functions. (CVE-2013-1992)

  - Multiple integer overflows in X.org libGLX in Mesa 9.1.1     and earlier allow X servers to trigger allocation of     insufficient memory and a buffer overflow via vectors     related to the (1) XF86DRIOpenConnection and (2)     XF86DRIGetClientDriverName functions. (CVE-2013-1993)

  - Buffer overflow in X.org libXvMC 1.0.7 and earlier     allows X servers to cause a denial of service (crash)     and possibly execute arbitrary code via crafted length     or index values to the XvMCGetDRInfo function.
    (CVE-2013-1999)

  - Multiple buffer overflows in X.org libXxf86dga 1.1.3 and     earlier allow X servers to cause a denial of service     (crash) and possibly execute arbitrary code via crafted     length or index values to the (1) XDGAQueryModes and (2)     XDGASetMode functions. (CVE-2013-2000)

  - Buffer overflow in X.org libXxf86vm 1.1.2 and earlier     allows X servers to cause a denial of service (crash)     and possibly execute arbitrary code via crafted length     or index values to the XF86VidModeGetGammaRamp function.
    (CVE-2013-2001)

  - Integer overflow in X.org libXcursor 1.1.13 and earlier     allows X servers to trigger allocation of insufficient     memory and a buffer overflow via vectors related to the
    _XcursorFileHeaderCreate function. (CVE-2013-2003)

  - Integer overflow in X.org libXtst 1.2.1 and earlier     allows X servers to trigger allocation of insufficient     memory and a buffer overflow via vectors related to the     XRecordGetContext function. (CVE-2013-2063)

  - Integer overflow in X.org libxcb 1.9 and earlier allows     X servers to trigger allocation of insufficient memory     and a buffer overflow via vectors related to the     read_packet function. (CVE-2013-2064)

  - Buffer overflow in X.org libXv 1.0.7 and earlier allows     X servers to cause a denial of service (crash) and     possibly execute arbitrary code via crafted length or     index values to the XvQueryPortAttributes function.
    (CVE-2013-2066)

Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way various X11 client libraries handled certain protocol data. An attacker able to submit invalid protocol data to an X11 server via a malicious X11 client could use either of these flaws to potentially escalate their privileges on the system.
(CVE-2013-1981 , CVE-2013-1982 , CVE-2013-1983 , CVE-2013-1984 , CVE-2013-1985 , CVE-2013-1986 , CVE-2013-1987 , CVE-2013-1988 , CVE-2013-1989 , CVE-2013-1990 , CVE-2013-1991 , CVE-2013-2003 , CVE-2013-2062 , CVE-2013-2064)

Multiple array index errors, leading to heap-based buffer out-of-bounds write flaws, were found in the way various X11 client libraries handled data returned from an X11 server. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-1997 , CVE-2013-1998 , CVE-2013-1999 , CVE-2013-2000 , CVE-2013-2001 , CVE-2013-2002 , CVE-2013-2066)

A buffer overflow flaw was found in the way the XListInputDevices() function of X.Org X11's libXi runtime library handled signed numbers.
A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client.
(CVE-2013-1995)

A flaw was found in the way the X.Org X11 libXt runtime library used uninitialized pointers. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-2005)

Two stack-based buffer overflow flaws were found in the way libX11, the Core X11 protocol client library, processed certain user-specified files. A malicious X11 server could possibly use this flaw to crash an X11 client via a specially crafted file. (CVE-2013-2004)

Updated X11 client libraries packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The X11 (Xorg) libraries provide library routines that are used within all X Window applications.

Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way various X11 client libraries handled certain protocol data. An attacker able to submit invalid protocol data to an X11 server via a malicious X11 client could use either of these flaws to potentially escalate their privileges on the system.
(CVE-2013-1981, CVE-2013-1982, CVE-2013-1983, CVE-2013-1984, CVE-2013-1985, CVE-2013-1986, CVE-2013-1987, CVE-2013-1988, CVE-2013-1989, CVE-2013-1990, CVE-2013-1991, CVE-2013-2003, CVE-2013-2062, CVE-2013-2064)

Multiple array index errors, leading to heap-based buffer out-of-bounds write flaws, were found in the way various X11 client libraries handled data returned from an X11 server. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-1997, CVE-2013-1998, CVE-2013-1999, CVE-2013-2000, CVE-2013-2001, CVE-2013-2002, CVE-2013-2066)

A buffer overflow flaw was found in the way the XListInputDevices() function of X.Org X11's libXi runtime library handled signed numbers.
A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client.
(CVE-2013-1995)

A flaw was found in the way the X.Org X11 libXt runtime library used uninitialized pointers. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-2005)

Two stack-based buffer overflow flaws were found in the way libX11, the Core X11 protocol client library, processed certain user-specified files. A malicious X11 server could possibly use this flaw to crash an X11 client via a specially crafted file. (CVE-2013-2004)

The xkeyboard-config package has been upgraded to upstream version 2.11, which provides a number of bug fixes and enhancements over the previous version. (BZ#1077471)

This update also fixes the following bugs :

* Previously, updating the mesa-libGL package did not update the libX11 package, although it was listed as a dependency of mesa-libGL.
This bug has been fixed and updating mesa-libGL now updates all dependent packages as expected. (BZ#1054614)

* Previously, closing a customer application could occasionally cause the X Server to terminate unexpectedly. After this update, the X Server no longer hangs when a user closes a customer application.
(BZ#971626)

All X11 client libraries users are advised to upgrade to these updated packages, which correct these issues and add these enhancements.

Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way various X11 client libraries handled certain protocol data. An attacker able to submit invalid protocol data to an X11 server via a malicious X11 client could use either of these flaws to potentially escalate their privileges on the system.
(CVE-2013-1981, CVE-2013-1982, CVE-2013-1983, CVE-2013-1984, CVE-2013-1985, CVE-2013-1986, CVE-2013-1987, CVE-2013-1988, CVE-2013-1989, CVE-2013-1990, CVE-2013-1991, CVE-2013-2003, CVE-2013-2062, CVE-2013-2064)

Multiple array index errors, leading to heap-based buffer out-of-bounds write flaws, were found in the way various X11 client libraries handled data returned from an X11 server. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-1997, CVE-2013-1998, CVE-2013-1999, CVE-2013-2000, CVE-2013-2001, CVE-2013-2002, CVE-2013-2066)

A buffer overflow flaw was found in the way the XListInputDevices() function of X.Org X11's libXi runtime library handled signed numbers.
A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client.
(CVE-2013-1995)

A flaw was found in the way the X.Org X11 libXt runtime library used uninitialized pointers. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-2005)

Two stack-based buffer overflow flaws were found in the way libX11, the Core X11 protocol client library, processed certain user-specified files. A malicious X11 server could possibly use this flaw to crash an X11 client via a specially crafted file. (CVE-2013-2004)

The xkeyboard-config package has been upgraded to upstream version 2.11, which provides a number of bug fixes and enhancements over the previous version.

This update also fixes the following bugs :

  - Previously, updating the mesa-libGL package did not     update the libX11 package, although it was listed as a     dependency of mesa-libGL. This bug has been fixed and     updating mesa-libGL now updates all dependent packages     as expected.

  - Previously, closing a customer application could     occasionally cause the X Server to terminate     unexpectedly. After this update, the X Server no longer     hangs when a user closes a customer application.

This update of libxcb fixes a integer overflow issue :

  -     U_0001-integer-overflow-in-read_packet-CVE-2013-2064.pat     ch 

  - fixes integer overflow in read_packet() [CVE-2013-2064]     (bnc#821584, bnc#815451)

The remote host is affected by the vulnerability described in GLSA-201405-07 (X.Org X Server: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in X.Org X Server. Please       review the CVE identifiers referenced below for details.
  Impact :

    A context-dependent attacker could execute arbitrary code with the       privileges of the process, cause a Denial of Service condition, or obtain       sensitive information.
  Workaround :

    There is no known workaround at this time.

Fix integer overflow (CVE-2013-2064)

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.

This update for xorg-x11-libxcb addresses the following security issues :

  - Fix a deadlock with multi-threaded applications running     on real time kernels. (bnc#818829)

  - Fix an integer overflow in read_packet(). (bnc#821584,     CVE-2013-2064)

Ilja van Sprundel discovered multiple security issues in various X.org libraries and components. An attacker could use these issues to cause applications to crash, resulting in a denial of service, or possibly execute arbitrary code.

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.

freedesktop.org reports :

Ilja van Sprundel, a security researcher with IOActive, has discovered a large number of issues in the way various X client libraries handle the responses they receive from servers, and has worked with X.Org's security team to analyze, confirm, and fix these issues.

Most of these issues stem from the client libraries trusting the server to send correct protocol data, and not verifying that the values will not overflow or cause other damage. Most of the time X clients & servers are run by the same user, with the server more privileged from the clients, so this is not a problem, but there are scenarios in which a privileged client can be connected to an unprivileged server, for instance, connecting a setuid X client (such as a screen lock program) to a virtual X server (such as Xvfb or Xephyr) which the user has modified to return invalid data, potentially allowing the user to escalate their privileges.

The vulnerabilities include :

Integer overflows calculating memory needs for replies.

Sign extension issues calculating memory needs for replies.

Buffer overflows due to not validating length or offset values in replies.

Integer overflows parsing user-specified files.

Unbounded recursion parsing user-specified files.

Memory corruption due to unchecked return values.

Ilja van Sprundel of IOActive discovered several security issues in multiple components of the X.org graphics stack and the related libraries: Various integer overflows, sign handling errors in integer conversions, buffer overflows, memory corruption and missing input sanitising may lead to privilege escalation or denial of service.

ID	Name	Product	Family	Severity
92543	Oracle Secure Global Desktop Multiple Vulnerabilities (July 2016 CPU)	Nessus	Misc.	critical
80819	Oracle Solaris Third-Party Patch Update : xorg (multiple_vulnerabilities_in_x_org)	Nessus	Solaris Local Security Checks	medium
79560	Amazon Linux AMI : libX11 / libXcursor,libXfixes,libXi,libXrandr,libXrender,libXres,libXt,libXv,libXvMC,libXxf86dga,libXxf86vm,libdmx,xorg-x11-proto-devel (ALAS-2014-452)	Nessus	Amazon Linux Local Security Checks	medium
79182	CentOS 6 : libX11 / libXcursor / libXext / libXfixes / libXi / libXinerama / libXp / libXrandr / etc (CESA-2014:1436)	Nessus	CentOS Local Security Checks	medium
78841	Scientific Linux Security Update : X11 client libraries on SL6.x i386/x86_64 (20141014)	Nessus	Scientific Linux Local Security Checks	medium
78411	RHEL 6 : X11 client libraries (RHSA-2014:1436)	Nessus	Red Hat Local Security Checks	medium
78348	Amazon Linux AMI : libxcb (ALAS-2014-405)	Nessus	Amazon Linux Local Security Checks	medium
75027	openSUSE Security Update : libxcb (openSUSE-SU-2013:1007-1)	Nessus	SuSE Local Security Checks	medium
74028	GLSA-201405-07 : X.Org X Server: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	medium
67355	Fedora 18 : libxcb-1.9-3.fc18 (2013-9156)	Nessus	Fedora Local Security Checks	medium
67114	SuSE 11.2 Security Update : xorg-x11-libxcb (SAT Patch Number 7760)	Nessus	SuSE Local Security Checks	medium
66819	Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.04 : libxcb vulnerability (USN-1855-1)	Nessus	Ubuntu Local Security Checks	medium
66798	FreeBSD : xorg -- protocol handling issues in X Window System client libraries (2eebebff-cd3b-11e2-8f09-001b38c3836c)	Nessus	FreeBSD Local Security Checks	medium
66608	Fedora 19 : libxcb-1.9-3.fc19 (2013-9070)	Nessus	Fedora Local Security Checks	medium
66570	Debian DSA-2686-1 : libxcb - several vulnerabilities	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2013-2064

high

Tenable Plugins

critical

medium

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