Gnome-remote-desktop: gnome-remote-desktop: unauthenticated rdp sockets lack a handshake deadline

A denial-of-service flaw was found in gnome-remote-desktop. An unauthenticated remote attacker can open RDP connections without completing the handshake and retain the connection-throttling slots indefinitely because no pre-authentication handshake deadline is enforced. By exhausting the global connection limit, an attacker can prevent new RDP clients from connecting until a holding socket is closed.

Gnome Fonts Viewer 3.34.0 Heap Corruption

Gnome Fonts Viewer 3.34.0 contains a heap corruption vulnerability that allows attackers to trigger an out-of-bounds write by crafting a malicious TTF font file. Attackers can generate a specially crafted TTF file with an oversized pattern to exhaust memory through repeated malloc() calls and potentially crash the gnome-font-viewer process.

security flaw

Mozilla Firefox before 2.0.0.8 and SeaMonkey before 1.1.5, when running on Linux systems with gnome-vfs support, might allow remote attackers to read arbitrary files on SSH/sftp servers that accept key authentication by creating a web page on the target server, in which the web page contains URIs with (1) smb: or (2) sftp: schemes that access other files from the server.

XScreenSaver in Sun Solaris 10 and OpenSolaris before snv_109, and Solaris 8 and 9 with GNOME 2.0 or 2.0.2, allows physically proximate attackers to obtain sensitive information by reading popup windows, which are displayed even when the screen is locked, as demonstrated by Thunderbird new-mail notifications.

yelp: Invalid URI format string vulnerability (remote arbitrary code execution)

Format string vulnerability in the window_error function in yelp-window.c in yelp in Gnome after 2.19.90 and before 2.24 allows remote attackers to execute arbitrary code via format string specifiers in an invalid URI on the command line, as demonstrated by use of yelp within (1) man or (2) ghelp URI handlers in Firefox, Evolution, and unspecified other programs.

security flaw

The iptables ruleset in Gnome-lokkit in Red Hat Linux 8.0 does not include any rules in the FORWARD chain, which could allow attackers to bypass intended access restrictions if packet forwarding is enabled.

Buffer overflow in GNOME libraries 1.0.8 allows local user to gain root access via a long --espeaker argument in programs such as nethack.

security flaw

VTE, as used by default in gnome-terminal terminal emulator 2.2 and as an option in gnome-terminal 2.0, allows attackers to modify the window title via a certain character escape sequence and then insert it back to the command line in the user's terminal, e.g. when the user views a file containing the malicious sequence, which could allow the attacker to execute arbitrary commands.

gnome-control-center: GNOME Settings could allow unintended access to network services.

Ubuntu's configuration of gnome-control-center allowed Remote Desktop Sharing to be enabled by default.

Gnome-maps: gnome maps is vulnerable to a code injection attack (similar to xss) via its service.json

A flaw was found in GNOME Maps, which is vulnerable to a code injection attack via its service.json configuration file. If the configuration file is malicious, it may execute arbitrary code.

gnome-session: Bad reference counting in accept_ice_connection() permits resource exhaustion

Bad reference counting in the context of accept_ice_connection() in gsm-xsmp-server.c in old versions of gnome-session up until version 2.29.92 allows a local attacker to establish ICE connections to gnome-session with invalid authentication data (an invalid magic cookie). Each failed authentication attempt will leak a file descriptor in gnome-session. When the maximum number of file descriptors is exhausted in the gnome-session process, it will enter an infinite loop trying to communicate without success, consuming 100% of the CPU. The graphical session associated with the gnome-session process will stop working correctly, because communication with gnome-session is no longer possible.

gnome-shell: Mishandling extensions that fail to reload

gnome-shell 3.22 through 3.24.1 mishandles extensions that fail to reload, which can lead to leaving extensions enabled in the lock screen. With these extensions, a bystander could launch applications (but not interact with them), see information from the extensions (e.g., what applications you have opened or what music you were playing), or even execute arbitrary commands. It all depends on what extensions a user has enabled. The problem is caused by lack of exception handling in js/ui/extensionSystem.js.

gdm: local DoS possible when cancelling and disable-user-list=true when fallback greeter is used

GNOME Display Manager (gdm) 3.4.1 and earlier, when disable-user-list is set to true, allows local users to cause a denial of service (unable to login) by pressing the cancel button after entering a user name.

vte: Excessive memory and CPU use by processing certain character sequences

The "insert-blank-characters" capability in caps.c in gnome-terminal (vte) before 0.28.1 allows remote authenticated users to cause a denial of service (CPU and memory consumption and crash) via a crafted file, as demonstrated by a file containing the string "\033[100000000000000000@".

gnome-shell: run command dialog visible above screen locker

The automatic screen lock functionality in GNOME Shell (aka gnome-shell) before 3.10 does not prevent access to the "Enter a Command" dialog, which allows physically proximate attackers to execute arbitrary commands by leveraging an unattended workstation.

gnome-shell: blind command execution via activities search keyboard focus

js/ui/screenShield.js in GNOME Shell (aka gnome-shell) before 3.8 allows physically proximate attackers to execute arbitrary commands by leveraging an unattended workstation with the keyboard focus on the Activities search.

Mozilla: Linux file chooser crashes on malformed JPEG2000 and TGA images due to flaws in underlying libraries (MFSA 2015-143)

The gdk-pixbuf configuration in Mozilla Firefox before 43.0 on Linux GNOME platforms incorrectly enables the TGA decoder, which allows remote attackers to cause a denial of service (heap-based buffer overflow) via a crafted Truevision TGA image.

gnome-shell: lockscreen bypass with printscreen key

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.

Mozilla: Linux file chooser crashes on malformed JPEG2000 and TGA images due to flaws in underlying libraries (MFSA 2015-143)

The gdk-pixbuf configuration in Mozilla Firefox before 43.0 on Linux GNOME platforms incorrectly enables the JasPer decoder, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted JPEG 2000 image.

gdm: Crash when holding Escape in log screen

GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.