4456 : Linux Kernel mxcsr CPU State Register Modification
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	722	about 9 years ago	about 5 years ago	0 times	85%

Timeline

Disclosure Date
2003-06-03

Description

Linux kernel contains a flaw that may allow a local denial of service. The issue is triggered when the Linux kernel function "set_fpxregs" doesn't consider the "__copy_from_user" failed condition. This could cause the contents of the MXCSR register to be corrupted, and potentially cause a reserved bit within the register to be unexpectedly set, resulting in loss of availability for the platform.

Classification

Location: Local Access Required
Attack Type: Denial of Service
Impact: Loss of Availability
Exploit: Exploit Unknown

Solution

Upgrade the linux kernel to version 2.4.23 or higher, as it has been reported to fix this vulnerability. This can be done through various Linux vendor patches or manually installing a newer kernel. An upgrade is required as there are no known workarounds.

Products

Linux Kernel Organization, Inc.	Kernel	2.0.22
		2.2.18
		2.4.0
		2.4.1
		2.4.10
		2.4.11
		2.4.12
		2.4.13
		2.4.14
		2.4.15
		2.4.16
		2.4.17
		2.4.18
		2.4.19
		2.4.2
		2.4.20
		2.4.21
		2.4.3
		2.4.4
		2.4.5
		2.4.6
		2.4.7
		2.4.8
		2.4.9

References

Tools & Filters

	12401 14049 14057 15148 15149 15169 15173 15279

Credit

Andrea Arcangeli - andreae-mind.com -

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

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