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RedHatRHSA-2009:1548
HistoryNov 03, 2009 - 12:00 a.m.

(RHSA-2009:1548) Important: kernel security and bug fix update

2009-11-0300:00:00
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28

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

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.073 Low

EPSS

Percentile

93.4%

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

Security fixes:

  • 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 the eCryptfs implementation
    in the Linux kernel. A local attacker could use this flaw to cause a local
    denial of service or escalate their privileges. (CVE-2009-2908, Important)

  • a flaw was found in the NFSv4 implementation. The kernel would do an
    unnecessary permission check after creating a file. This check would
    usually fail and leave the file with the permission bits set to random
    values. Note: This is a server-side only issue. (CVE-2009-3286, 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)

  • a flaw was found in the Realtek r8169 Ethernet driver in the Linux
    kernel. pci_unmap_single() presented a memory leak that could lead to IOMMU
    space exhaustion and a system crash. An attacker on the local network could
    abuse this flaw by using jumbo frames for large amounts of network traffic.
    (CVE-2009-3613, Important)

  • missing initialization flaws were found in the Linux kernel. Padding data
    in several core network structures was not initialized properly before
    being sent to user-space. These flaws could lead to information leaks.
    (CVE-2009-3228, Moderate)

Bug fixes:

  • with network bonding in the “balance-tlb” or “balance-alb” mode, the
    primary setting for the primary slave device was lost when said device was
    brought down. Bringing the slave back up did not restore the primary
    setting. (BZ#517971)

  • some faulty serial device hardware caused systems running the kernel-xen
    kernel to take a very long time to boot. (BZ#524153)

  • a caching bug in nfs_readdir() may have caused NFS clients to see
    duplicate files or not see all files in a directory. (BZ#526960)

  • the RHSA-2009:1243 update removed the mpt_msi_enable option, preventing
    certain scripts from running. This update adds the option back. (BZ#526963)

  • an iptables rule with the recent module and a hit count value greater
    than the ip_pkt_list_tot parameter (the default is 20), did not have any
    effect over packets, as the hit count could not be reached. (BZ#527434)

  • a check has been added to the IPv4 code to make sure that rt is not NULL,
    to help prevent future bugs in functions that call ip_append_data() from
    being exploitable. (BZ#527436)

  • a kernel panic occurred in certain conditions after reconfiguring a tape
    drive’s block size. (BZ#528133)

  • when using the Linux Virtual Server (LVS) in a master and backup
    configuration, and propagating active connections on the master to the
    backup, the connection timeout value on the backup was hard-coded to 180
    seconds, meaning connection information on the backup was soon lost. This
    could prevent the successful failover of connections. The timeout value
    can now be set via “ipvsadm --set”. (BZ#528645)

  • a bug in nfs4_do_open_expired() could have caused the reclaimer thread on
    an NFSv4 client to enter an infinite loop. (BZ#529162)

  • MSI interrupts may not have been delivered for r8169 based network cards
    that have MSI interrupts enabled. This bug only affected certain systems.
    (BZ#529366)

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

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.073 Low

EPSS

Percentile

93.4%

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