A UNIX Symbolic Link (Symlink) Following vulnerability in chkstat of SUSE Linux Enterprise Server 12, SUSE Linux Enterprise Server 15, SUSE Linux Enterprise Server 11 set permissions intended for specific binaries on other binaries because it erroneously followed symlinks. The symlinks can't be controlled by attackers on default systems, so exploitation is difficult. This issue affects: SUSE Linux Enterprise Server 12 permissions versions prior to 2015.09.28.1626-17.27.1. SUSE Linux Enterprise Server 15 permissions versions prior to 20181116-9.23.1. SUSE Linux Enterprise Server 11 permissions versions prior to 2013.1.7-0.6.12.1.
Description of problem: http://lkml.org/lkml/2010/9/11/170 The CHELSIOGETQSETNUM device ioctl allows unprivileged users to read 4 bytes of uninitialized stack memory, because the "addr" member of the chreg struct declared on the stack in cxgbextensionioctl() is not altered or zeroed before being copied back to the user.
Acknowledgements:
Red Hat would like to thank Dan Rosenberg for reporting this issue.
Description of problem: http://lkml.org/lkml/2010/9/11/168 The EQLGETMASTRCFG device ioctl allows unprivileged users to read 16 bytes of uninitialized stack memory, because the "mastername" member of the masterconfigt struct declared on the stack in eqlgmastercfg() is not altered or zeroed before being copied back to the user.
Acknowledgements:
Red Hat would like to thank Dan Rosenberg for reporting this issue.
Description of problem: This problem was originally tracked down by Brad Spengler.
When calling wireless ioctls, if a driver does not correctly validate/shrink iwp->length, the resulting copytouser can leak up to 64K of kernel heap contents.
It seems that this is triggerable[1] in 2.6.32 at least on ath5k, but I was not able to track down how. The twisty maze of ioctl handlers stumped me. :) Other drivers I checked did not appear to have any problems, but the potential remains. I'm not sure if this patch is the right approach; it was fixed differently[2] in grsecurity.
[1] http://forums.grsecurity.net/viewtopic.php?f=3&t=2290&start=0 [2] http://grsecurity.net/~spender/wireless-infoleak-fix2.patch
Discussion: http://lkml.org/lkml/2010/8/27/413
Buffer overflow in the utilpathencode function in udev/lib/libudev-util.c in udev before 1.4.1 allows local users to cause a denial of service (service outage) via vectors that trigger a call with crafted arguments.
QEMU 0.9.0 does not properly handle changes to removable media, which allows guest OS users to read arbitrary files on the host OS by using the diskformat: parameter in the -usbdevice option to modify the disk-image header to identify a different format, a related issue to CVE-2008-2004.