Buffer overflow in the TIFF reader in gui/image/qtiffhandler.cpp in Qt 4.7.4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via the TIFFTAG_SAMPLESPERPIXEL tag in a greyscale TIFF image with multiple samples per pixel.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-1328 advisory.

    - Resolves: #rhbz737813        fix multiple flaws in Qt        CVE-2011-3193, CVE-2011-3194

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.

CVE-2011-3193

Check for buffer overflow in Lookup_MarkMarkPos that may cause crash in this function with certain fonts.

CVE-2011-3194

Fix tiff reader to handle TIFFTAG_SAMPLESPERPIXEL for grayscale images. The reader uses QImage::Format_Indexed8, but since the samples per pixel value this should be (non-existent) QImage::Format_Indexed16, causing memory corruption. The fix falls back to the 'normal' way of reading tiff images.

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

Specially crafted font files could cause a single byte heap based buffer overflow (CVE-2011-3193).

Specially crafted grey scale images could cause a heap based buffer overflow (CVE-2011-3194).

Specially crafted font files could cause a single byte heap based buffer overflow (CVE-2011-3193).

Specially crafted grey scale images could cause a heap based buffer overflow (CVE-2011-3194).

The update also fixes the following non-security bugs :

  - fix QFileDialog not showing system files (bnc#669604)

  - fix font fallback handling (bnc#643848)

  - add support for postgresql 8.3 and 9 (bnc#668210)

  - Path added: bnc#592962 - Set application icon.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-1323 advisory.

    [1:4.6.2-17.1]
    - Resolves: #rhbz737812        fix multiple flaws in Qt        CVE-2011-3193, CVE-2011-3194

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.

Qt is a software toolkit that simplifies the task of writing and maintaining GUI (Graphical User Interface) applications for the X Window System. HarfBuzz is an OpenType text shaping engine.

A buffer overflow flaw was found in the harfbuzz module in Qt. If a user loaded a specially crafted font file with an application linked against Qt, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2011-3193)

A buffer overflow flaw was found in the way Qt handled certain gray-scale image files. If a user loaded a specially crafted gray-scale image file with an application linked against Qt, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application.
(CVE-2011-3194)

Users of Qt should upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against Qt libraries must be restarted for this update to take effect.

It was discovered that Qt did not properly handle wildcard domain names or IP addresses in the Common Name field of X.509 certificates.
An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. This issue only affected Ubuntu 10.04 LTS. (CVE-2010-5076)

A heap-based buffer overflow was discovered in the HarfBuzz module. If a user were tricked into opening a crafted font file in a Qt application, an attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2011-3193)

It was discovered that Qt did not properly handle greyscale TIFF images. If a Qt application could be made to process a crafted TIFF file, an attacker could cause a denial of service. (CVE-2011-3194).

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.

The remote host is affected by the vulnerability described in GLSA-201206-02 (QtGui: User-assisted execution of arbitrary code)

    An error in qtiffhandler.cpp could cause a buffer overflow.
  Impact :

    A remote attacker could entice a user to open a specially crafted TIFF       image with an application linked against QtGui, possibly resulting in       execution of arbitrary code with the privileges of the process or a       Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

The following security issues have been fixed :

  - Specially crafted font files could cause a single byte     heap based buffer overflow. (CVE-2011-3193)

  - Specially crafted grey scale images could cause a     heap-based buffer overflow. (CVE-2011-3194)

  - SSL servers could run into an endless loop     (CVE-2010-2621) The update also fixes the following     non-security bugs :

  - QFileDialog, to show system files (bnc#669604),

  - matching of SSL certificates mentioning IP addresses     (bnc#637293),

  - the font fallback handling (bnc#643848),

  - handling of transparent monochromatic pixmaps     (bnc#610578),

  - a crash of QtWebKit with flash player (bnc#613818)

QtGui

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.

Updated qt packages that fix two security issues are now available for Red Hat Enterprise Linux 6 FasTrack.

The Red Hat Security Response Team 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.

Qt is a software toolkit that simplifies the task of writing and maintaining GUI (Graphical User Interface) applications for the X Window System. HarfBuzz is an OpenType text shaping engine.

A buffer overflow flaw was found in the harfbuzz module in Qt. If a user loaded a specially crafted font file with an application linked against Qt, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2011-3193)

A buffer overflow flaw was found in the way Qt handled certain gray-scale image files. If a user loaded a specially crafted gray-scale image file with an application linked against Qt, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application.
(CVE-2011-3194)

Users of Qt should upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against Qt libraries must be restarted for this update to take effect.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2011:1323 advisory.

  - qt/harfbuzz buffer overflow (CVE-2011-3193)

  - qt buffer overflow in greyscale images (CVE-2011-3194)

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

ID	Name	Product	Family	Severity
181021	Oracle Linux 6 : qt (ELSA-2011-1328)	Nessus	Oracle Linux Local Security Checks	high
82100	Debian DLA-117-1 : qt4-x11 security update	Nessus	Debian Local Security Checks	high
75917	openSUSE Security Update : libQtWebKit-devel (openSUSE-SU-2011:1120-1)	Nessus	SuSE Local Security Checks	high
75609	openSUSE Security Update : libQtWebKit-devel (openSUSE-SU-2011:1119-1)	Nessus	SuSE Local Security Checks	high
68353	Oracle Linux 6 : qt (ELSA-2011-1323)	Nessus	Oracle Linux Local Security Checks	high
61141	Scientific Linux Security Update : qt on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	high
59957	Ubuntu 10.04 LTS / 11.04 : qt4-x11 vulnerabilities (USN-1504-1)	Nessus	Ubuntu Local Security Checks	high
59630	GLSA-201206-02 : QtGui: User-assisted execution of arbitrary code	Nessus	Gentoo Local Security Checks	high
57112	SuSE 11.1 Security Update : Qt (SAT Patch Number 5131)	Nessus	SuSE Local Security Checks	high
56302	Fedora 15 : qt-4.7.4-2.fc15 (2011-12193)	Nessus	Fedora Local Security Checks	high
56288	Fedora 14 : qt-4.7.4-2.fc14 (2011-12145)	Nessus	Fedora Local Security Checks	high
56255	RHEL 6 : qt (RHSA-2011:1328)	Nessus	Red Hat Local Security Checks	high
56250	RHEL 6 : qt (RHSA-2011:1323)	Nessus	Red Hat Local Security Checks	critical

Detections

Analytics

CVE-2011-3194

critical

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high

high

critical