A memory leak was found in the way libpng processed malformed Portable Network Graphics (PNG) images with Physical Scale (sCAL) extension. A remote attacker could create a specially-crafted PNG image and trick the local user into opening it in an application, using the libpng library, leading to denial of service (relevant libpng-based application crash).

References: [1] http://www.libpng.org/pub/png/libpng.html

CVE Request: [2] http://www.openwall.com/lists/oss-security/2010/06/28/2

Description of problem: packetgetnamespkt() doesn't initialize all members of sadata field of sockaddr struct if strlen(dev->name) < 13. This structure is then copied to userland. It leads to leaking of contents of kernel stack memory. We have to fully fill sadata with strncpy() instead of strlcpy().

The same with packetgetname(): it doesn't initialize sllpkttype field of sockaddrll. Set it to zero.

Reference: http://marc.info/?l=linux-netdev&m=128854507220908&w=2 http://seclists.org/oss-sec/2010/q4/94

Acknowledgements:

Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.

Description of problem: In bcmconnect() (in net/can/bcm.c), there is the following code:

sprintf(bo->procname, "%p", sock);

"procname" is a 9-byte char array. On 64-bit platforms, up to 17 bytes may be copied into the buffer. Fortunately, structure padding will most likely prevent this from being a problem, except for the trailing NULL byte, which may overwrite the first byte of the next heap object.

Reference: http://www.spinics.net/lists/netdev/msg145791.html

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.

Description of problem: http://lkml.org/lkml/2010/9/11/167

The TIOCGICOUNT device ioctl allows unprivileged users to read 9 bytes of uninitialized stack memory, because the "reserved" member of the serialicounterstruct struct declared on the stack in hsogetcount() is not altered or zeroed before being copied back to the user. This patch takes care of it.

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.

Buffer overflow in pngpread.c in libpng before 1.2.44 and 1.4.x before 1.4.3, as used in progressive applications, might allow remote attackers to execute arbitrary code via a PNG image that triggers an additional data row.

Description of problem: Calling ETHTOOLGRXCLSRLALL with a large rulecnt will allocate kernel heap without clearing it. For the one driver (niu) that implements it, it will leave the unused portion of heap unchanged and copy the full contents back to userspace.

This is different from CVE-2010-2478, but was introduced at the same time (0853ad66, 2.6.27-rc1).

Upstream commit: http://git.kernel.org/linus/ae6df5f96a51818d6376da5307d773baeece4014

Acknowledgements:

Red Hat would like to thank Kees Cook for reporting this issue.

The pollmodeio file for the megaraidsas driver in the Linux kernel 2.6.31.6 and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.

net/unix/afunix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AFUNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.

Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc//fd/ pathname.

Array index error in the gdthreadevent function in drivers/scsi/gdth.c in the Linux kernel before 2.6.32-rc8 allows local users to cause a denial of service or possibly gain privileges via a negative event index in an IOCTL request.

A security flaw was found in the WebKit's Cross-Origin Resource Sharing (CORS) implementation. Quoting exact details from the WebKit advisory:

Before allowing a page from one origin to access a resource in another origin, WebKit sends a preflight request, to determine if the origin server for the resource being accessed will allow the resource to be shared. WebKit includes custom HTTP headers specified by the requesting page in the preflight request. This can result in unexpected actions being initiated on the cross-origin site without user consent. This issue is addressed by dropping custom HTTP headers from preflight requests.

Upstream bug: ------------- https://bugs.webkit.org/showbug.cgi?id=28446

Upstream patch: --------------- http://trac.webkit.org/changeset/47494

libxml2 before 2.7.8, as used in Google Chrome before 7.0.517.44, Apple Safari 5.0.2 and earlier, and other products, reads from invalid memory locations during processing of malformed XPath expressions, which allows context-dependent attackers to cause a denial of service (application crash) via a crafted XML document.

An off by one memory read out of bounds issue exists in WebKit's handling of HTML lists. Visiting a maliciously crafted website may lead to an unexpected application termination or the disclosure of the contents of memory. This issue is addressed through improved bounds checking.

References:

Bugzilla: https://bugs.webkit.org/showbug.cgi?id=39508 Trac: http://trac.webkit.org/changeset/59950

Acknowledgements:

Red Hat would like to thank Drew Yao of Apple Product Security for responsibly reporting this issue.

A use after free issue exists in WebKit's handling of geolocation events. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved handing of geolocation events.

References:

Bugzilla: https://bugs.webkit.org/showbug.cgi?id=39388 Trac: http://trac.webkit.org/changeset/59859

Acknowledgements:

Red Hat would like to thank Drew Yao of Apple Product Security for responsibly reporting this issue. Upstream acknowledges Justin Schuh as the original reporter.

WebKit, as used in Apple Safari before 4.1.3 and 5.0.x before 5.0.3 and Google Chrome before 6.0.472.62, does not properly perform a cast of an unspecified variable, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via an SVG element in a non-SVG document.

Directory traversal vulnerability in slp.c in the MSN protocol plugin in libpurple in Pidgin 2.6.4 and Adium 1.3.8 allows remote attackers to read arbitrary files via a .. (dot dot) in an application/x-msnmsgrp2p MSN emoticon (aka custom smiley) request, a related issue to CVE-2004-0122. NOTE: it could be argued that this is resultant from a vulnerability in which an emoticon download request is processed even without a preceding text/x-mms-emoticon message that announced availability of the emoticon.

Directory traversal vulnerability in libtransmission/metainfo.c in Transmission 1.22, 1.34, 1.75, and 1.76 allows remote attackers to overwrite arbitrary files via a .. (dot dot) in a pathname within a .torrent file.

The vsffilenamepassesfilter function in ls.c in vsftpd before 2.3.3 allows remote authenticated users to cause a denial of service (CPU consumption and process slot exhaustion) via crafted glob expressions in STAT commands in multiple FTP sessions, a different vulnerability than CVE-2010-2632.