Linux Security
Linux Security
Linux Security

Debian: New Linux kernel 2.6.8 packages fix several vulnerabilities

Date 26 Jun 2006
Posted By LinuxSecurity Advisories
Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2005-3359 CVE-2006-0038 CVE-2006-0039 CVE-2006-0456 CVE-2006-0554 CVE-2006-0555 CVE-2006-0557 CVE-2006-0558 CVE-2006-0741 CVE-2006-0742 CVE-2006-0744 CVE-2006-1056 CVE-2006-1242 CVE-2006-1368 CVE-2006-1523 CVE-2006-1524 CVE-2006-1525 CVE-2006-1857 CVE-2006-1858 CVE-2006-1863 CVE-2006-1864 CVE-2006-2271 CVE-2006-2272 CVE-2006-2274
- --------------------------------------------------------------------------
Debian Security Advisory DSA 1103-1                    This email address is being protected from spambots. You need JavaScript enabled to view it.                   Dann Frazier, Troy Heber
June 27th, 2006               
- --------------------------------------------------------------------------

Package        : kernel-source-2.6.8
Vulnerability  : several
Problem-Type   : local/remote
Debian-specific: no
CVE ID         : CVE-2005-3359 CVE-2006-0038 CVE-2006-0039 CVE-2006-0456
                 CVE-2006-0554 CVE-2006-0555 CVE-2006-0557 CVE-2006-0558
                 CVE-2006-0741 CVE-2006-0742 CVE-2006-0744 CVE-2006-1056
                 CVE-2006-1242 CVE-2006-1368 CVE-2006-1523 CVE-2006-1524
                 CVE-2006-1525 CVE-2006-1857 CVE-2006-1858 CVE-2006-1863
                 CVE-2006-1864 CVE-2006-2271 CVE-2006-2272 CVE-2006-2274

Several local and remote vulnerabilities have been discovered in the Linux
kernel that may lead to a denial of service or the execution of arbitrary
code. The Common Vulnerabilities and Exposures project identifies the
following problems:


    Franz Filz discovered that some socket calls permit causing inconsistent
    reference counts on loadable modules, which allows local users to cause
    a denial of service.

    "Solar Designer" discovered that arithmetic computations in netfilter's
    do_replace() function can lead to a buffer overflow and the execution of
    arbitrary code. However, the operation requires CAP_NET_ADMIN privileges,
    which is only an issue in virtualization systems or fine grained access
    control systems.


    "Solar Designer" discovered a race condition in netfilter's
    do_add_counters() function, which allows information disclosure of kernel
    memory by exploiting a race condition. Likewise, it requires CAP_NET_ADMIN


    David Howells discovered that the s390 assembly version of the
    strnlen_user() function incorrectly returns some string size values.


    It was discovered that the ftruncate() function of XFS can expose
    unallocated, which allows information disclosure of previously deleted


    It was discovered that some NFS file operations on handles mounted with
    O_DIRECT can force the kernel into a crash.


    It was discovered that the code to configure memory policies allows
    tricking the kernel into a crash, thus allowing denial of service.


    It was discovered by Cliff Wickman that perfmon for the IA64
    architecture allows users to trigger a BUG() assert, which allows
    denial of service.


    Intel EM64T systems were discovered to be susceptible to a local
    DoS due to an endless recursive fault related to a bad elf entry


    Alan and Gareth discovered that the ia64 platform had an
    incorrectly declared die_if_kernel() function as "does never
    return" which could be exploited by a local attacker resulting in
    a kernel crash.


    The Linux kernel did not properly handle uncanonical return
    addresses on Intel EM64T CPUs, reporting exceptions in the SYSRET
    instead of the next instruction, causing the kernel exception
    handler to run on the user stack with the wrong GS. This may result
    in a DoS due to a local user changing the frames.


    AMD64 machines (and other 7th and 8th generation AuthenticAMD
    processors) were found to be vulnerable to sensitive information
    leakage, due to how they handle saving and restoring the FOP, FIP,
    and FDP x87 registers in FXSAVE/FXRSTOR when an exception is
    pending. This allows a process to determine portions of the state
    of floating point instructions of other processes.


    Marco Ivaldi discovered that there was an unintended information
    disclosure allowing remote attackers to bypass protections against
    Idle Scans (nmap -sI) by abusing the ID field of IP packets and
    bypassing the zero IP ID in DF packet countermeasure. This was a
    result of the ip_push_pending_frames function improperly
    incremented the IP ID field when sending a RST after receiving
    unsolicited TCP SYN-ACK packets.


    Shaun Tancheff discovered a buffer overflow (boundry condition
    error) in the USB Gadget RNDIS implementation allowing remote
    attackers to cause a DoS. While creating a reply message, the
    driver allocated memory for the reply data, but not for the reply
    structure. The kernel fails to properly bounds-check user-supplied
    data before copying it to an insufficiently sized memory
    buffer. Attackers could crash the system, or possibly execute
    arbitrary machine code.


    Oleg Nesterov reported an unsafe BUG_ON call in signal.c which was
    introduced by RCU signal handling. The BUG_ON code is protected by
    siglock while the code in switch_exit_pids() uses tasklist_lock. It
    may be possible for local users to exploit this to initiate a denial
    of service attack (DoS).


    Hugh Dickins discovered an issue in the madvise_remove function wherein
    file and mmap restrictions are not followed, allowing local users to
    bypass IPC permissions and replace portions of readonly tmpfs files with


    Alexandra Kossovsky reported a NULL pointer dereference condition in
    ip_route_input() that can be triggered by a local user by requesting
    a route for a multicast IP address, resulting in a denial of service


    Vlad Yasevich reported a data validation issue in the SCTP subsystem
    that may allow a remote user to overflow a buffer using a badly formatted
    HB-ACK chunk, resulting in a denial of service.


    Vlad Yasevich reported a bug in the bounds checking code in the SCTP
    subsystem that may allow a remote attacker to trigger a denial of service
    attack when rounded parameter lengths are used to calculate parameter
    lengths instead of the actual values.


    Mark Mosely discovered that chroots residing on an CIFS share can be
    escaped with specially crafted "cd" sequences.


    Mark Mosely discovered that chroots residing on an SMB share can be
    escaped with specially crafted "cd" sequences.


    The "Mu security team" discovered that carefully crafted ECNE chunks can
    cause a kernel crash by accessing incorrect state stable entries in the
    SCTP networking subsystem, which allows denial of service.


    The "Mu security team" discovered that fragmented SCTP control
    chunks can trigger kernel panics, which allows for denial of
    service attacks.


    It was discovered that SCTP packets with two initial bundled data
    packets can lead to infinite recursion, which allows for denial of
    service attacks.

The following matrix explains which kernel version for which architecture
fix the problems mentioned above:

                                 Debian 3.1 (sarge)
     Source                      2.6.8-16sarge3
     Alpha architecture          2.6.8-16sarge3
     HP Precision architecture   2.6.8-6sarge3
     Intel IA-32 architecture    2.6.8-16sarge3
     Intel IA-64 architecture    2.6.8-14sarge3
     Motorola 680x0 architecture 2.6.8-4sarge3
     PowerPC architecture        2.6.8-12sarge3
     IBM S/390 architecture      2.6.8-5sarge3
     Sun Sparc architecture      2.6.8-15sarge3

Due to technical problems the built amd64 packages couldn't be processed
by the archive script. Once this problem is resolved, an updated DSA 1103-2
will be sent out with the checksums for amd64.

The following matrix lists additional packages that were rebuilt for
compatibility with or to take advantage of this update:

                                 Debian 3.1 (sarge)
     fai-kernels                 1.9.1sarge2

We recommend that you upgrade your kernel package immediately and reboot
the machine. If you have built a custom kernel from the kernel source
package, you will need to rebuild to take advantage of these fixes.

Upgrade Instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 3.1 alias sarge
- --------------------------------

  Source archives:
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  Architecture independent components:
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      Size/MD5 checksum:    35082 7b08d82ec9046359cd85ea87aad96995
      Size/MD5 checksum:    10934 0d1c81689deeaa145be9e4d3ae140a81

  Alpha architecture:
      Size/MD5 checksum:  2757876 e94cdb8d12552d293018c7ca24199f47
      Size/MD5 checksum:   230608 fdf2cc6f010f2b618672422c3293f3b9
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      Size/MD5 checksum: 20220874 d9c1642300f72cc5f3fc3b04865b3b3d
      Size/MD5 checksum: 20073352 1faa9472c15dd6142221fec2261b5628

  HP Precision architecture:
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      Size/MD5 checksum:   209500 8b284495343adf74bca8219421f4b48d
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      Size/MD5 checksum: 16020358 6423b4288f949286ce1c70a743d03373
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      Size/MD5 checksum: 18306822 88ade3c07fc414c82bf589def0bda600

  Intel IA-32 architecture:
      Size/MD5 checksum:  2777236 af649947c652a9486461b92bbc33be8a
      Size/MD5 checksum:   256920 88db1b684f215fdd35de0989f148b57f
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      Size/MD5 checksum:   254818 746967059979238eb49cfdcba572c07b
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      Size/MD5 checksum:  2779348 210a335431d029842eb82036d5326edf
      Size/MD5 checksum:   258446 1d48b727a22487e4b34f4894b2a9a7f2
      Size/MD5 checksum:   256322 8f73439c2a920c66ae05d3ceba45229a
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      Size/MD5 checksum:   256504 5a5c2acd3ef2fb3764489ed77865739e
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      Size/MD5 checksum: 15346402 fffd9fb96343167ccc32356fa307152a
      Size/MD5 checksum: 15261026 cbdee84292a612fddca022377e38eebb
      Size/MD5 checksum: 15124168 248b85e7c59930aeb63fda6a0366b9a2

  Intel IA-64 architecture:
      Size/MD5 checksum:     6606 27049d0c329dc1cad092b2d53c3322ec
      Size/MD5 checksum:     6678 f3967dddbec5691733d49246d09f8cb3
      Size/MD5 checksum:     6638 acc1b57c5a246304f9cee279574811e9
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      Size/MD5 checksum: 22041474 4419d9b68b593646ed49ff194fcbcc9e
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  Motorola 680x0 architecture:
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  PowerPC architecture:
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      Size/MD5 checksum: 13577038 981f85ad155781610e2069f28b1eb4e7
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      Size/MD5 checksum: 13594454 93d70ceed88a16e7af0fe3db1a2c5baa
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      Size/MD5 checksum: 13494684 2ab633af498a4486190d3754c530e7f4
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      Size/MD5 checksum: 13486150 80b9f2ed16acb2c9fdb7c9cb133a4c03
      Size/MD5 checksum: 13842602 e4013da64e44e6e0401aa87b1e68c1ce
      Size/MD5 checksum: 13514634 a3fbbf23d7b805431a5f9f28aadd25ab
      Size/MD5 checksum: 13769858 20783767bb65e7ea6ca76662438bf7ca

  IBM S/390 architecture:
      Size/MD5 checksum:  5083010 42c4dd8c6c67ce7940f0d24bb745385c
      Size/MD5 checksum:  5087230 aa48eb8b2a3a5f215bba97329947a2eb
      Size/MD5 checksum:  2973758 c8d12dd2fbddca3ab1b7bd905de4a90c
      Size/MD5 checksum:  1140118 328edfc2944127e2f1d6dca1842ce51d
      Size/MD5 checksum:  3179326 487c36323990a6ae1119f4c30f16cdd9
      Size/MD5 checksum:  2977844 c491248ed7d4c71415be782f7fbe77e9
      Size/MD5 checksum:  1142366 fddcd4821b89cbf30f47d5df380f2961
      Size/MD5 checksum:  3186726 3eaf46617bf0ee1de50cad55f351aa54

  Sun Sparc architecture:
      Size/MD5 checksum:     3462 c68f0624f124db25f3a41f78432ca11c
      Size/MD5 checksum:     5194 b90da0337cb607278aa01d4ec0c19a3a
      Size/MD5 checksum:  2888690 29723527245a48a00e724c7366868ec9
      Size/MD5 checksum:   107974 788d40ca3a1a3f53b8b2cf4c1fc4badc
      Size/MD5 checksum:   142726 8719b1bf0d3aff36f7711d8979f87a7d
      Size/MD5 checksum:   143332 87bc055c575e3ec3ea44136ed44dff6a
      Size/MD5 checksum:  2890616 a3717a911c04df4af4917c5a0366a8de
      Size/MD5 checksum:   109996 d42960c6242e6a62d5a2cb9809645bea
      Size/MD5 checksum:   144710 f1c0a8b3bf641019d7831cc1277ba524
      Size/MD5 checksum:   145366 505e40a256abd9fa04a49321fba69115
      Size/MD5 checksum:  4545570 00d7c7e1caef41efcbc198a282f2b9f2
      Size/MD5 checksum:  7428184 1f146c58f98331bf5826520379bacd33
      Size/MD5 checksum:  7622116 4de4c114879d82d79fc34cb93c070d43
      Size/MD5 checksum:  4550972 ea3ec35673aed896ec9416a8f470bf77
      Size/MD5 checksum:  7431000 fab9d693f9c9642b67e0d386f3df01ee
      Size/MD5 checksum:  7628010 8c922a4190017515210c6738213b0782

  These files will probably be moved into the stable distribution on
  its next update.

- ---------------------------------------------------------------------------------
For apt-get: deb stable/updates main
For dpkg-ftp: dists/stable/updates/main
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