74123 : Linux Kernel ext4 Subsystem Extent Format Sparse File Off-by-one Local DoS
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Timeline

Disclosure Date
2011-06-03

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2011-2695" target="_blank">CVE</a>)</em> : Multiple off-by-one errors in the ext4 subsystem in the Linux kernel before 3.0-rc5 allow local users to cause a denial of service (BUG_ON and system crash) by accessing a sparse file in extent format with a write operation involving a block number corresponding to the largest possible 32-bit unsigned integer.

Classification

Location: Local Access Required
Attack Type: Denial of Service
Impact: Loss of Availability
Solution: Upgrade
Disclosure: Vendor Verified

Solution

Upgrade to version 3.0-rc5 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Unknown or Incomplete

References

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 4.9
Source: nvd.nist.gov | Generated: 2011-07-29 | Disagree?

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