The NEEDBITS macro in the inflatedynamic function in inflate.c for unzip can be invoked using invalid buffers, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors that trigger a free of uninitialized or previously-freed data.
Description of problem: Fuse in general and Fedora's way to let only members of the group fuse access and use fuse was discussed in https://www.redhat.com/archives/fedora-desktop-list/2007-September/msg00163.html and mails below in that thread.
There we noticed that members of the group fuse can get access to devices which they normally should not have access to. See https://www.redhat.com/archives/fedora-desktop-list/2007-September/msg00163.html ; the relevant parts of it:
$ ls -l /dev/sda3 brw-r----- 1 root disk 8, 3 14. Sep 16:10 /dev/sda3 $ groups thl fuse $ dd if=/dev/sda3 bs=512K count=1 | strings dd: opening /dev/sda3': Permission denied $ mkdir ntfs $ /sbin/mount.ntfs-3g /dev/sda3 ntfs/ $ touch ntfs/foo $ ls -l ntfs/foo -rwxrwxrwx 1 thl thl 0 18. Sep 19:27 ntfs/foo
ntfs-3g IMHO should fail, as the users should not get access to random devices he has no access to. Quoting Alexander Larsson from https://www.redhat.com/archives/fedora-desktop-list/2007-September/msg00171.html
Thats quite weird. The way I undestand fuse is that you run the filesystem as your user, and then that filesystem (via libfuse) spawns fusermount to open the fuse device and attach to the mountpoint. fusermount then passes the fd to the fuse device back the the filesystem process (via a socket) which then handles all the requests. Reading the data source for the filesystem (if there is any) is only done by the filesystem process, not by the setuid fusermount helper, so it should not be able to read /dev/sda3.
Further investigation showed that ntfs-3g gets installed SUID root:
$ ls -l /sbin/mount.ntfs-3g -rwsr-xr-- 1 root fuse 40528 17. Sep 23:14 /sbin/mount.ntfs-3g
That might be wrong as that afaics makes it possible for ntfs-3g to access devices which the user normally would not have access to. Quoting Alexander again, this time from https://www.redhat.com/archives/fedora-desktop-list/2007-September/msg00174.html
Oh. That seems like a bad idea to me. If this drops privs after opening the device I think you can attach to the process using e.g. gdb and call any read() operation on the device. If might even mean (with some creative exploits) that any fuse group user can read any block on any disk.
Version-Release number of selected component (if applicable): ntfs-3g-1.913-1.fc8
Please note that I as ex-maintainer of fuse stumbled into this by accident -- I don't care much about fuse and ntfs-3g these days, but I think the behavior of ntfs-3g is a security bug.
Mozilla Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 do not properly escape quote characters used for XML processing, which allows remote attackers to conduct XML injection attacks via the default namespace in an E4X document.
The JavaScript engine in Mozilla Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) via vectors related to "insufficient class checking" in the Date class.
nsFrameManager in Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying properties of a file input element while it is still being initialized, then using the blur method to access uninitialized memory.
jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.proto.proto object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJISNATIVE function.
Integer overflow in xpcom/io/nsEscape.cpp in the browser engine in Mozilla Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) via unknown vectors.
The session restore feature in Mozilla Firefox 3.x before 3.0.4 and 2.x before 2.0.0.18 allows remote attackers to violate the same origin policy to conduct cross-site scripting (XSS) attacks and execute arbitrary JavaScript with chrome privileges via unknown vectors.
The nsXMLHttpRequest::NotifyEventListeners method in Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to bypass the same-origin policy and execute arbitrary script via multiple listeners, which bypass the inner window check.
Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to bypass the protection mechanism for codebase principals and execute arbitrary script via the -moz-binding CSS property in a signed JAR file.
The gnutlsx509verifycertificate function in lib/x509/verify.c in libgnutls in GnuTLS before 2.6.1 trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate, which allows man-in-the-middle attackers to insert a spoofed certificate for any Distinguished Name (DN).
The hfsplusblockallocate function in fs/hfsplus/bitmap.c in the Linux kernel before 2.6.28-rc1 does not check a certain return value from the readmappingpage function before calling kmap, which allows attackers to cause a denial of service (system crash) via a crafted hfsplus filesystem image.
Mozilla Firefox 3.0.1 through 3.0.3, Firefox 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13, when running on Windows, do not properly identify the context of Windows .url shortcut files, which allows user-assisted remote attackers to bypass the Same Origin Policy and obtain sensitive information via an HTML document that is directly accessible through a filesystem, as demonstrated by documents in (1) local folders, (2) Windows share folders, and (3) RAR archives, and as demonstrated by IFRAMEs referencing shortcuts that point to (a) about:cache?device=memory and (b) about:cache?device=disk, a variant of CVE-2008-2810.
The XPConnect component in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allows remote attackers to "pollute XPCNativeWrappers" and execute arbitrary code with chrome privileges via vectors related to (1) chrome XBL and (2) chrome JS.
Directory traversal vulnerability in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allows remote attackers to bypass "restrictions imposed on local HTML files," and obtain sensitive information and prompt users to write this information into a file, via directory traversal sequences in a resource: URI.
Integer overflow in the MathML component in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via an mtd element with a large integer value in the rowspan attribute, related to the layout engine.
Devin Carraway of the Debian Security Team discovered that the upstream fix for the CVE-2008-2079 is incomplete and still makes it possible for local users to create tables via INDEX/DATA DIRECTORY directives in the MySQL data directory (/var/lib/mysql) via directory symlinks.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=480292#25
CVE-2008-2079 was tracked via bug bug #445222.
An attacker needs following to exploit this issue: - MySQL database account with privileges to create tables - shell access to the host running MySQL database with write access to a directory accessible by the mysqld daemon process
Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allow remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via byte order mark (BOM) characters that are removed from JavaScript code before execution, aka "Stripped BOM characters bug."
Directory traversal vulnerability in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 on Linux allows remote attackers to read arbitrary files via a .. (dot dot) and URL-encoded / (slash) characters in a resource: URI.
Multiple unspecified vulnerabilities in Mozilla Firefox 3.x before 3.0.2 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to the layout engine and (1) a zero value of the "this" variable in the nsContentList::Item function; (2) interaction of the indic IME extension, a Hindi language selection, and the "g" character; and (3) interaction of the nsFrameList::SortByContentOrder function with a certain insufficient protection of inline frames.
Multiple unspecified vulnerabilities in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to the JavaScript engine and (1) misinterpretation of the characteristics of Namespace and QName in jsxml.c, (2) misuse of signed integers in the nsEscapeCount function in nsEscape.cpp, and (3) interaction of JavaScript garbage collection with certain use of an NPObject in the nsNPObjWrapper::GetNewOrUsed function in nsJSNPRuntime.cpp.
Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, and SeaMonkey before 1.1.12, allow user-assisted remote attackers to move a window during a mouse click, and possibly force a file download or unspecified other drag-and-drop action, via a crafted onmousedown action that calls window.moveBy, a variant of CVE-2003-0823.
Heap-based buffer overflow in the xmlParseAttValueComplex function in parser.c in libxml2 before 2.7.0 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a long XML entity name.
The shmemdeleteinode function in mm/shmem.c in the tmpfs implementation in the Linux kernel before 2.6.26.1 allows local users to cause a denial of service (system crash) via a certain sequence of file create, remove, and overwrite operations, as demonstrated by the insserv program, related to allocation of "useless pages" and improper maintenance of the iblocks count.
Off-by-one error in the ioviteradvance function in mm/filemap.c in the Linux kernel before 2.6.27-rc2 allows local users to cause a denial of service (system crash) via a certain sequence of file I/O operations with readv and writev, as demonstrated by testcases/kernel/fs/ftest/ftest03 from the Linux Test Project.
Daniel Veillard discovered that a specially crafted document can lead to a recursive evaluation of entities, the result being an exhaustion of memory and CPU usage
Acknowledgements:
Red Hat would like to thank Andreas Solberg for responsibly disclosing this issue.
Description of problem: Zoltan Sogor noticed this VFS behaviour while testing UBIFS. Lookup can install a child dentry for a deleted directory. This keeps the directory dentry alive, and the inode pinned in the cache and on disk, even after all external references have gone away.
This isn't a big problem normally, since memory pressure or umount will clear out the directory dentry and its children, releasing the inode. But for UBIFS this causes problems because its orphan area can overflow.
http://lkml.org/lkml/2008/7/2/83 http://www.linux-mtd.infradead.org/doc/ubifs.html
The sndseqosssynthmakeinfo function in sound/core/seq/oss/seqosssynth.c in the sound subsystem in the Linux kernel before 2.6.27-rc2 does not verify that the device number is within the range defined by maxsynthdev before returning certain data to the caller, which allows local users to obtain sensitive information.
Multiple buffer overflows in Python 2.5.2 and earlier on 32bit platforms allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a long string that leads to incorrect memory allocation during Unicode string processing, related to the unicoderesize function and the PyMemRESIZE macro.
Cross-site scripting (XSS) vulnerability in proxyftp.c in the modproxyftp module in Apache 2.0.63 and earlier, and modproxyftp.c in the modproxyftp module in Apache 2.2.9 and earlier 2.2 versions, allows remote attackers to inject arbitrary web script or HTML via a wildcard in the last directory component in the pathname in an FTP URI.