|
Linux Kernel Multiple Vulnerabilities
|
|
Secunia Advisory:
|
SA13572
|
|
|
Release Date:
|
2004-12-22
|
|
Popularity:
|
16,590 views
|
|
|
Critical:
|
Less critical
|
|
Impact:
|
Exposure of sensitive information
DoS
|
|
Where:
|
Local system
|
|
Solution Status:
|
Unpatched
|
|
| OS: | Linux Kernel 2.6.x
|
|
|
Subscribe:
|
Instant alerts on relevant vulnerabilities 
|
|
| CVE reference: | CVE-2004-1056
CVE-2004-1058
|
|
Description:
Multiple vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or gain knowledge of potentially sensitive information.
1) A NULL pointer dereference error in the "aio_free_ring()" system call can be exploited to crash the system by mapping out as much of the process address space as possible and then call the "io_setup()" function with an extremely large value (about 65000) in the "nr_events" argument.
The vulnerability has been reported in version 2.6.9. Other versions may also be affected.
2) An error in the DRM (Direct Rendering Manager) drivers due to insufficient DMA lock checking can be exploited to crash the X server or modify video output.
3) A race condition within the handling of "/proc/.../cmdline" may disclose the content of environment variables of spawning processes.
Solution:
Secunia is currently not aware of an updated version, which fixes the vulnerabilities.
Grant only trusted users access to affected systems.
Provided and/or discovered by:
1) Darrick J. Wong
2) Thomas Hellström
3) Rob Landley
|
|
|
Track this Secunia Advisory
|
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released.
Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.
|
|
|
About this Secunia Advisory
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
