RedHat: Important: kernel security and bug fix update RHSA-2009:1106-01
Summary
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security fixes:
* several flaws were found in the way the Linux kernel CIFS implementation
handles Unicode strings. CIFS clients convert Unicode strings sent by a
server to their local character sets, and then write those strings into
memory. If a malicious server sent a long enough string, it could write
past the end of the target memory region and corrupt other memory areas,
possibly leading to a denial of service or privilege escalation on the
client mounting the CIFS share. (CVE-2009-1439, CVE-2009-1633, Important)
* the Linux kernel Network File System daemon (nfsd) implementation did not
drop the CAP_MKNOD capability when handling requests from local,
unprivileged users. This flaw could possibly lead to an information leak or
privilege escalation. (CVE-2009-1072, Moderate)
* Frank Filz reported the NFSv4 client was missing a file permission check
for the execute bit in some situations. This could allow local,
unprivileged users to run non-executable files on NFSv4 mounted file
systems. (CVE-2009-1630, Moderate)
* a missing check was found in the hypervisor_callback() function in the
Linux kernel provided by the kernel-xen package. This could cause a denial
of service of a 32-bit guest if an application running in that guest
accesses a certain memory location in the kernel. (CVE-2009-1758, Moderate)
* a flaw was found in the AGPGART driver. The agp_generic_alloc_page() and
agp_generic_alloc_pages() functions did not zero out the memory pages they
allocate, which may later be available to user-space processes. This flaw
could possibly lead to an information leak. (CVE-2009-1192, Low)
Bug fixes:
* a race in the NFS client between destroying cached access rights and
unmounting an NFS file system could have caused a system crash. "Busy
inodes" messages may have been logged. (BZ#498653)
* nanosleep() could sleep several milliseconds less than the specified time
on Intel Itanium
Summary
Solution
References
Package List
![Dist Redhat](/images/distros/dist-redhat.png)
Topic
Updated kernel packages that fix several security issues and several bugsare now available for Red Hat Enterprise Linux 5.This update has been rated as having important security impact by the RedHat Security Response Team.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64
Bugs Fixed