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RedHatRHSA-2009:1672
HistoryDec 15, 2009 - 12:00 a.m.

(RHSA-2009:1672) Important: kernel security and bug fix update

2009-12-1500:00:00
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18

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

8.6%

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues:

  • a system with SELinux enforced was more permissive in allowing local
    users in the unconfined_t domain to map low memory areas even if the
    mmap_min_addr restriction was enabled. This could aid in the local
    exploitation of NULL pointer dereference bugs. (CVE-2009-2695, Important)

  • a NULL pointer dereference flaw was found in each of the following
    functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and
    pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could
    be released by other processes before it is used to update the pipe’s
    reader and writer counters. This could lead to a local denial of service or
    privilege escalation. (CVE-2009-3547, Important)

This update also fixes the following bug:

  • a bug in the IPv6 implementation in the Linux kernel could have caused an
    unbalanced reference count. When using network bonding, this bug may have
    caused a hang when shutting the system down via “shutdown -h”, or prevented
    the network service from being stopped via “service network stop”.
    (BZ#538409)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

Use Vulners API to create your own security tool

API usage cases
  • Network scanning
  • Linux Patch management
  • Threat protection
  • No network audit solution

Ways of integration

Integrate Vulners API

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

8.6%

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