ID CVE-2014-7300
Summary GNOME Shell 3.14.x before 3.14.1, when the Screen Lock feature is used, does not limit the aggregate memory consumption of all active PrtSc requests, which allows physically proximate attackers to execute arbitrary commands on an unattended workstation by making many PrtSc requests and leveraging a temporary lock outage, and the resulting temporary shell availability, caused by the Linux kernel OOM killer.
References
Vulnerable Configurations
  • GNOME gnome-shell 3.14.0
    cpe:2.3:a:gnome:gnome-shell:3.14.0
  • RedHat Enterprise Linux Workstation 7.0
    cpe:2.3:o:redhat:enterprise_linux_workstation:7.0
  • RedHat Enterprise Linux Server 7.0
    cpe:2.3:o:redhat:enterprise_linux_server:7.0
  • RedHat Enterprise Linux HPC Node 7.0
    cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0
  • RedHat Enterprise Linux Desktop 7.0
    cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
CVSS
Base: 7.2 (as of 31-08-2016 - 10:38)
Impact:
Exploitability:
CWE CWE-399
CAPEC
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
nessus via4
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2015-0535.NASL
    description Updated gnome-shell, mutter, clutter, and cogl packages that fix one security issue, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Low 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. GNOME Shell and the packages it depends upon provide the core user interface of the Red Hat Enterprise Linux desktop, including functions such as navigating between windows and launching applications. It was found that the GNOME shell did not disable the Print Screen key when the screen was locked. This could allow an attacker with physical access to a system with a locked screen to crash the screen-locking application by creating a large amount of screenshots. (CVE-2014-7300) This update also fixes the following bugs : * The Timed Login feature, which automatically logs in a specified user after a specified period of time, stopped working after the first user of the GUI logged out. This has been fixed, and the specified user is always logged in if no one else logs in. (BZ#1043571) * If two monitors were arranged vertically with the secondary monitor above the primary monitor, it was impossible to move windows onto the secondary monitor. With this update, windows can be moved through the upper edge of the first monitor to the secondary monitor. (BZ#1075240) * If the Gnome Display Manager (GDM) user list was disabled and a user entered the user name, the password prompt did not appear. Instead, the user had to enter the user name one more time. The GDM code that contained this error has been fixed, and users can enter their user names and passwords as expected. (BZ#1109530) * Prior to this update, only a small area was available on the GDM login screen for a custom text banner. As a consequence, when a long banner was used, it did not fit into the area, and the person reading the banner had to use scrollbars to view the whole text. With this update, more space is used for the banner if necessary, which allows the user to read the message conveniently. (BZ#1110036) * When the Cancel button was pressed while an LDAP user name and password was being validated, the GDM code did not handle the situation correctly. As a consequence, GDM became unresponsive, and it was impossible to return to the login screen. The affected code has been fixed, and LDAP user validation can be canceled, allowing another user to log in instead. (BZ#1137041) * If the window focus mode in GNOME was set to 'mouse' or 'sloppy', navigating through areas of a pop-up menu displayed outside its parent window caused the window to lose its focus. Consequently, the menu was not usable. This has been fixed, and the window focus is kept in under this scenario. (BZ#1149585) * If user authentication is configured to require a smart card to log in, user names are obtained from the smart card. The authentication is then performed by entering the smart card PIN. Prior to this update, the login screen allowed a user name to be entered if no smart card was inserted, but due to a bug in the underlying code, the screen became unresponsive. If, on the other hand, a smart card was used for authentication, the user was logged in as soon as the authentication was complete. As a consequence, it was impossible to select a session other than GNOME Classic. Both of these problems have been fixed. Now, a smart card is required when this type of authentication is enabled, and any other installed session can be selected by the user. (BZ#1159385, BZ#1163474) In addition, this update adds the following enhancement : * Support for quad-buffer OpenGL stereo visuals has been added. As a result, OpenGL applications that use quad-buffer stereo can be run and properly displayed within the GNOME desktop when used with a video driver and hardware with the necessary capabilities. (BZ#861507, BZ#1108890, BZ#1108891, BZ# 1108893) All GNOME Shell users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement.
    last seen 2018-09-02
    modified 2015-05-19
    plugin id 81898
    published 2015-03-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=81898
    title CentOS 7 : clutter / cogl / gnome-shell / mutter (CESA-2015:0535)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2014-615.NASL
    description - Add gnome-settings-daemon-no-lockscreen-screenshot.patch : + media-keys: Disallow screenshots when locked (boo#900031, bgo#737456, CVE-2014-7300).
    last seen 2018-09-02
    modified 2014-12-30
    plugin id 78836
    published 2014-11-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78836
    title openSUSE Security Update : gnome-settings-daemon (openSUSE-SU-2014:1348-1)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2015-0515-1.NASL
    description gnome-settings-daemon was updated to fix a bug and a security issue : Security issue fixed : - CVE-2014-7300: The lockscreen can be bypassed with the Print Screen button. Bug fixed : - Do not hide the cursor while there was no mutter running (bsc#905158). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-09-02
    modified 2016-04-05
    plugin id 83700
    published 2015-05-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=83700
    title SUSE SLED12 / SLES12 Security Update : gnome-settings-daemon (SUSE-SU-2015:0515-1)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2015-0535.NASL
    description From Red Hat Security Advisory 2015:0535 : Updated gnome-shell, mutter, clutter, and cogl packages that fix one security issue, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Low 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. GNOME Shell and the packages it depends upon provide the core user interface of the Red Hat Enterprise Linux desktop, including functions such as navigating between windows and launching applications. It was found that the GNOME shell did not disable the Print Screen key when the screen was locked. This could allow an attacker with physical access to a system with a locked screen to crash the screen-locking application by creating a large amount of screenshots. (CVE-2014-7300) This update also fixes the following bugs : * The Timed Login feature, which automatically logs in a specified user after a specified period of time, stopped working after the first user of the GUI logged out. This has been fixed, and the specified user is always logged in if no one else logs in. (BZ#1043571) * If two monitors were arranged vertically with the secondary monitor above the primary monitor, it was impossible to move windows onto the secondary monitor. With this update, windows can be moved through the upper edge of the first monitor to the secondary monitor. (BZ#1075240) * If the Gnome Display Manager (GDM) user list was disabled and a user entered the user name, the password prompt did not appear. Instead, the user had to enter the user name one more time. The GDM code that contained this error has been fixed, and users can enter their user names and passwords as expected. (BZ#1109530) * Prior to this update, only a small area was available on the GDM login screen for a custom text banner. As a consequence, when a long banner was used, it did not fit into the area, and the person reading the banner had to use scrollbars to view the whole text. With this update, more space is used for the banner if necessary, which allows the user to read the message conveniently. (BZ#1110036) * When the Cancel button was pressed while an LDAP user name and password was being validated, the GDM code did not handle the situation correctly. As a consequence, GDM became unresponsive, and it was impossible to return to the login screen. The affected code has been fixed, and LDAP user validation can be canceled, allowing another user to log in instead. (BZ#1137041) * If the window focus mode in GNOME was set to 'mouse' or 'sloppy', navigating through areas of a pop-up menu displayed outside its parent window caused the window to lose its focus. Consequently, the menu was not usable. This has been fixed, and the window focus is kept in under this scenario. (BZ#1149585) * If user authentication is configured to require a smart card to log in, user names are obtained from the smart card. The authentication is then performed by entering the smart card PIN. Prior to this update, the login screen allowed a user name to be entered if no smart card was inserted, but due to a bug in the underlying code, the screen became unresponsive. If, on the other hand, a smart card was used for authentication, the user was logged in as soon as the authentication was complete. As a consequence, it was impossible to select a session other than GNOME Classic. Both of these problems have been fixed. Now, a smart card is required when this type of authentication is enabled, and any other installed session can be selected by the user. (BZ#1159385, BZ#1163474) In addition, this update adds the following enhancement : * Support for quad-buffer OpenGL stereo visuals has been added. As a result, OpenGL applications that use quad-buffer stereo can be run and properly displayed within the GNOME desktop when used with a video driver and hardware with the necessary capabilities. (BZ#861507, BZ#1108890, BZ#1108891, BZ# 1108893) All GNOME Shell users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement.
    last seen 2018-09-01
    modified 2015-12-04
    plugin id 81807
    published 2015-03-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=81807
    title Oracle Linux 7 : GNOME / Shell (ELSA-2015-0535)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20150305_GNOME_SHELL_ON_SL7_X.NASL
    description It was found that the GNOME shell did not disable the Print Screen key when the screen was locked. This could allow an attacker with physical access to a system with a locked screen to crash the screen-locking application by creating a large amount of screenshots. (CVE-2014-7300) This update also fixes the following bugs : - The Timed Login feature, which automatically logs in a specified user after a specified period of time, stopped working after the first user of the GUI logged out. This has been fixed, and the specified user is always logged in if no one else logs in. - If two monitors were arranged vertically with the secondary monitor above the primary monitor, it was impossible to move windows onto the secondary monitor. With this update, windows can be moved through the upper edge of the first monitor to the secondary monitor. - If the Gnome Display Manager (GDM) user list was disabled and a user entered the user name, the password prompt did not appear. Instead, the user had to enter the user name one more time. The GDM code that contained this error has been fixed, and users can enter their user names and passwords as expected. - Prior to this update, only a small area was available on the GDM login screen for a custom text banner. As a consequence, when a long banner was used, it did not fit into the area, and the person reading the banner had to use scrollbars to view the whole text. With this update, more space is used for the banner if necessary, which allows the user to read the message conveniently. - When the Cancel button was pressed while an LDAP user name and password was being validated, the GDM code did not handle the situation correctly. As a consequence, GDM became unresponsive, and it was impossible to return to the login screen. The affected code has been fixed, and LDAP user validation can be canceled, allowing another user to log in instead. - If the window focus mode in GNOME was set to 'mouse' or 'sloppy', navigating through areas of a pop-up menu displayed outside its parent window caused the window to lose its focus. Consequently, the menu was not usable. This has been fixed, and the window focus is kept in under this scenario. - If user authentication is configured to require a smart card to log in, user names are obtained from the smart card. The authentication is then performed by entering the smart card PIN. Prior to this update, the login screen allowed a user name to be entered if no smart card was inserted, but due to a bug in the underlying code, the screen became unresponsive. If, on the other hand, a smart card was used for authentication, the user was logged in as soon as the authentication was complete. As a consequence, it was impossible to select a session other than GNOME Classic. Both of these problems have been fixed. Now, a smart card is required when this type of authentication is enabled, and any other installed session can be selected by the user. In addition, this update adds the following enhancement : - Support for quad-buffer OpenGL stereo visuals has been added. As a result, OpenGL applications that use quad-buffer stereo can be run and properly displayed within the GNOME desktop when used with a video driver and hardware with the necessary capabilities.
    last seen 2018-09-02
    modified 2015-03-26
    plugin id 82249
    published 2015-03-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=82249
    title Scientific Linux Security Update : GNOME Shell on SL7.x x86_64
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-12690.NASL
    description Security fix for lock screen circumvention by consecutive screenshot requests triggering OOM situation 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.
    last seen 2018-09-01
    modified 2015-10-19
    plugin id 78569
    published 2014-10-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78569
    title Fedora 20 : gnome-shell-3.10.4-9.fc20 (2014-12690)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2015-0535.NASL
    description Updated gnome-shell, mutter, clutter, and cogl packages that fix one security issue, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Low 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. GNOME Shell and the packages it depends upon provide the core user interface of the Red Hat Enterprise Linux desktop, including functions such as navigating between windows and launching applications. It was found that the GNOME shell did not disable the Print Screen key when the screen was locked. This could allow an attacker with physical access to a system with a locked screen to crash the screen-locking application by creating a large amount of screenshots. (CVE-2014-7300) This update also fixes the following bugs : * The Timed Login feature, which automatically logs in a specified user after a specified period of time, stopped working after the first user of the GUI logged out. This has been fixed, and the specified user is always logged in if no one else logs in. (BZ#1043571) * If two monitors were arranged vertically with the secondary monitor above the primary monitor, it was impossible to move windows onto the secondary monitor. With this update, windows can be moved through the upper edge of the first monitor to the secondary monitor. (BZ#1075240) * If the Gnome Display Manager (GDM) user list was disabled and a user entered the user name, the password prompt did not appear. Instead, the user had to enter the user name one more time. The GDM code that contained this error has been fixed, and users can enter their user names and passwords as expected. (BZ#1109530) * Prior to this update, only a small area was available on the GDM login screen for a custom text banner. As a consequence, when a long banner was used, it did not fit into the area, and the person reading the banner had to use scrollbars to view the whole text. With this update, more space is used for the banner if necessary, which allows the user to read the message conveniently. (BZ#1110036) * When the Cancel button was pressed while an LDAP user name and password was being validated, the GDM code did not handle the situation correctly. As a consequence, GDM became unresponsive, and it was impossible to return to the login screen. The affected code has been fixed, and LDAP user validation can be canceled, allowing another user to log in instead. (BZ#1137041) * If the window focus mode in GNOME was set to 'mouse' or 'sloppy', navigating through areas of a pop-up menu displayed outside its parent window caused the window to lose its focus. Consequently, the menu was not usable. This has been fixed, and the window focus is kept in under this scenario. (BZ#1149585) * If user authentication is configured to require a smart card to log in, user names are obtained from the smart card. The authentication is then performed by entering the smart card PIN. Prior to this update, the login screen allowed a user name to be entered if no smart card was inserted, but due to a bug in the underlying code, the screen became unresponsive. If, on the other hand, a smart card was used for authentication, the user was logged in as soon as the authentication was complete. As a consequence, it was impossible to select a session other than GNOME Classic. Both of these problems have been fixed. Now, a smart card is required when this type of authentication is enabled, and any other installed session can be selected by the user. (BZ#1159385, BZ#1163474) In addition, this update adds the following enhancement : * Support for quad-buffer OpenGL stereo visuals has been added. As a result, OpenGL applications that use quad-buffer stereo can be run and properly displayed within the GNOME desktop when used with a video driver and hardware with the necessary capabilities. (BZ#861507, BZ#1108890, BZ#1108891, BZ# 1108893) All GNOME Shell users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement.
    last seen 2018-09-01
    modified 2017-01-06
    plugin id 81639
    published 2015-03-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=81639
    title RHEL 7 : GNOME Shell (RHSA-2015:0535)
redhat via4
advisories
bugzilla
id 1163474
title pam_pkcs11 with card_only breaks session selection
oval
AND
  • OR
    • comment Red Hat Enterprise Linux 7 Client is installed
      oval oval:com.redhat.rhsa:tst:20140675001
    • comment Red Hat Enterprise Linux 7 Server is installed
      oval oval:com.redhat.rhsa:tst:20140675002
    • comment Red Hat Enterprise Linux 7 Workstation is installed
      oval oval:com.redhat.rhsa:tst:20140675003
    • comment Red Hat Enterprise Linux 7 ComputeNode is installed
      oval oval:com.redhat.rhsa:tst:20140675004
  • OR
    • AND
      • comment cogl is earlier than 0:1.14.0-6.el7
        oval oval:com.redhat.rhsa:tst:20150535005
      • comment cogl is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535006
    • AND
      • comment cogl-devel is earlier than 0:1.14.0-6.el7
        oval oval:com.redhat.rhsa:tst:20150535009
      • comment cogl-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535010
    • AND
      • comment cogl-doc is earlier than 0:1.14.0-6.el7
        oval oval:com.redhat.rhsa:tst:20150535007
      • comment cogl-doc is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535008
    • AND
      • comment clutter is earlier than 0:1.14.4-12.el7
        oval oval:com.redhat.rhsa:tst:20150535011
      • comment clutter is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535012
    • AND
      • comment clutter-devel is earlier than 0:1.14.4-12.el7
        oval oval:com.redhat.rhsa:tst:20150535013
      • comment clutter-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535014
    • AND
      • comment clutter-doc is earlier than 0:1.14.4-12.el7
        oval oval:com.redhat.rhsa:tst:20150535015
      • comment clutter-doc is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535016
    • AND
      • comment gnome-shell is earlier than 0:3.8.4-45.el7
        oval oval:com.redhat.rhsa:tst:20150535017
      • comment gnome-shell is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535018
    • AND
      • comment gnome-shell-browser-plugin is earlier than 0:3.8.4-45.el7
        oval oval:com.redhat.rhsa:tst:20150535019
      • comment gnome-shell-browser-plugin is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535020
    • AND
      • comment mutter is earlier than 0:3.8.4-16.el7
        oval oval:com.redhat.rhsa:tst:20150535021
      • comment mutter is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535022
    • AND
      • comment mutter-devel is earlier than 0:3.8.4-16.el7
        oval oval:com.redhat.rhsa:tst:20150535023
      • comment mutter-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20150535024
rhsa
id RHSA-2015:0535
released 2015-03-05
severity Low
title RHSA-2015:0535: GNOME Shell security, bug fix, and enhancement update (Low)
rpms
  • cogl-0:1.14.0-6.el7
  • cogl-devel-0:1.14.0-6.el7
  • cogl-doc-0:1.14.0-6.el7
  • clutter-0:1.14.4-12.el7
  • clutter-devel-0:1.14.4-12.el7
  • clutter-doc-0:1.14.4-12.el7
  • gnome-shell-0:3.8.4-45.el7
  • gnome-shell-browser-plugin-0:3.8.4-45.el7
  • mutter-0:3.8.4-16.el7
  • mutter-devel-0:3.8.4-16.el7
refmap via4
confirm
mlist [oss-security] 20140929 gnome-shell lockscreen bypass with printscreen key
Last major update 31-08-2016 - 11:08
Published 25-12-2014 - 16:59
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