SB2004123105 - Security restrictions bypass in Linux kernel

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Main Vulnerability Database SB2004123105

SB2004123105 - Security restrictions bypass in Linux kernel

Published: December 31, 2004

Security Bulletin ID SB2004123105
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Security restrictions bypass (CVE-ID: CVE-2004-2536)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The exit_thread function (process.c) in Linux kernel 2.6 through 2.6.5 does not invalidate the per-TSS io_bitmap pointers if a process obtains IO access permissions from the ioperm function but does not drop those permissions when it exits, which allows other processes to access the per-TSS pointers, access restricted memory locations, and possibly gain privileges.


Remediation

Install update from vendor's website.

References