The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world-readable and world-writable) for shared memory segments, which allows local users to read sensitive information or modify critical program data, as demonstrated by reading a pixmap being sent to an X server.

This update fixes multiple security issues in the Qt library.

CVE-2013-0254

The QSharedMemory class uses weak permissions (world-readable and world-writable) for shared memory segments, which allows local users to read sensitive information or modify critical program data, as demonstrated by reading a pixmap being sent to an X server.

CVE-2015-0295 / CVE-2015-1858 / CVE-2015-1859 / CVE-2015-1860

Denial of service (via segmentation faults) through crafted images (BMP, GIF, ICO).

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.

libqt4 was updated to fix a information disclosure via QSharedMemory (CVE-2013-0254).

The remote host is affected by the vulnerability described in GLSA-201311-14 (QtCore, QtGui: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in QtCore and QtGui.
      Please review the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user to open a specially crafted file       with an application linked against QtCore or QtGui, possibly resulting in       execution of arbitrary code with the privileges of the process or a       Denial of Service condition. Furthermore, a remote attacker might employ       a specially crafted certificate to conduct man-in-the-middle attacks on       SSL connections.
  Workaround :

    There is no known workaround at this time.

From Red Hat Security Advisory 2013:0669 :

Updated qt packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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.

It was discovered that the QSharedMemory class implementation of the Qt toolkit created shared memory segments with insecure permissions. A local attacker could use this flaw to read or alter the contents of a particular shared memory segment, possibly leading to their ability to obtain sensitive information or influence the behavior of a process that is using the shared memory segment. (CVE-2013-0254)

Red Hat would like to thank the Qt project for reporting this issue.
Upstream acknowledges Tim Brown and Mark Lowe of Portcullis Computer Security Ltd. as the original reporters.

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

Updated qt packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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.

It was discovered that the QSharedMemory class implementation of the Qt toolkit created shared memory segments with insecure permissions. A local attacker could use this flaw to read or alter the contents of a particular shared memory segment, possibly leading to their ability to obtain sensitive information or influence the behavior of a process that is using the shared memory segment. (CVE-2013-0254)

Red Hat would like to thank the Qt project for reporting this issue.
Upstream acknowledges Tim Brown and Mark Lowe of Portcullis Computer Security Ltd. as the original reporters.

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

It was discovered that the QSharedMemory class implementation of the Qt toolkit created shared memory segments with insecure permissions. A local attacker could use this flaw to read or alter the contents of a particular shared memory segment, possibly leading to their ability to obtain sensitive information or influence the behavior of a process that is using the shared memory segment. (CVE-2013-0254)

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 a vulnerability as referenced in the RHSA-2013:0669 advisory.

  - qt: QSharedMemory class created shared memory segments with insecure permissions (CVE-2013-0254)

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

libqt4 has been updated to fix several security issues.

  - An information disclosure via QSharedMemory was fixed     which allowed local attackers to read information (e.g.
    bitmap content) from the attacked user. (CVE-2013-0254)

  - openssl-incompatibility-fix.diff: Fix wrong error     reporting when using a binary incompatible version of     openSSL. (bnc#797006, CVE-2012-6093)

  - Various compromised SSL root certificates were     blacklisted. Also a non-security bugfix has been applied :

  - Add fix for qdbusviewer not matching args (bnc#784197)

it fixes security flaw was found in the way QSharedMemory class, CVE-2013-0254

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.

Richard J. Moore and Peter Hartmann discovered that Qt allowed redirecting requests from http to file schemes. If an attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information. This issue only affected Ubuntu 11.10, Ubuntu 12.04 LTS, and Ubuntu 12.10. (CVE-2012-5624)

Stephen Cheng discovered that Qt may report incorrect errors when ssl certificate verification fails. (CVE-2012-6093)

Tim Brown and Mark Lowe discovered that Qt incorrectly used weak permissions on shared memory segments. A local attacker could use this issue to view sensitive information, or modify program data belonging to other users. (CVE-2013-0254).

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.

ID	Name	Product	Family	Severity
83164	Debian DLA-210-1 : qt4-x11 security update	Nessus	Debian Local Security Checks	medium
74917	openSUSE Security Update : libqt4 (openSUSE-SU-2013:0403-1)	Nessus	SuSE Local Security Checks	low
74916	openSUSE Security Update : libqt4 (openSUSE-SU-2013:0404-1)	Nessus	SuSE Local Security Checks	low
71073	GLSA-201311-14 : QtCore, QtGui: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
68795	Oracle Linux 6 : qt (ELSA-2013-0669)	Nessus	Oracle Linux Local Security Checks	low
65661	CentOS 6 : qt (CESA-2013:0669)	Nessus	CentOS Local Security Checks	low
65654	Scientific Linux Security Update : qt on SL6.x i386/x86_64 (20130321)	Nessus	Scientific Linux Local Security Checks	low
65652	RHEL 6 : qt (RHSA-2013:0669)	Nessus	Red Hat Local Security Checks	medium
65568	SuSE 11.2 Security Update : libqt4 (SAT Patch Number 7441)	Nessus	SuSE Local Security Checks	medium
65567	SuSE 11.2 Security Update : libqt4 (SAT Patch Number 7441)	Nessus	SuSE Local Security Checks	medium
64868	Fedora 17 : qt-4.8.4-11.fc17 (2013-1997)	Nessus	Fedora Local Security Checks	low
64638	Ubuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : qt4-x11 vulnerabilities (USN-1723-1)	Nessus	Ubuntu Local Security Checks	medium
64603	Fedora 18 : qt-4.8.4-11.fc18 (2013-2041)	Nessus	Fedora Local Security Checks	low

Detections

Analytics

CVE-2013-0254

medium

Tenable Plugins

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low

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high

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medium

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