Debian Security Advisory

DSA-2053-1 linux-2.6 -- privilege escalation/denial of service/information leak

Date Reported:
25 May 2010
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 573071.
In Mitre's CVE dictionary: CVE-2009-4537, CVE-2010-0727, CVE-2010-1083, CVE-2010-1084, CVE-2010-1086, CVE-2010-1087, CVE-2010-1088, CVE-2010-1162, CVE-2010-1173, CVE-2010-1187, CVE-2010-1437, CVE-2010-1446, CVE-2010-1451.
More information:

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

  • CVE-2009-4537

    Fabian Yamaguchi reported a missing check for Ethernet frames larger than the MTU in the r8169 driver. This may allow users on the local network to crash a system, resulting in a denial of service.

  • CVE-2010-0727

    Sachin Prabhu reported an issue in the GFS2 filesystem. Local users can trigger a BUG() altering the permissions on a locked file, resulting in a denial of service.

  • CVE-2010-1083

    Linus Torvalds reported an issue in the USB subsystem, which may allow local users to obtain portions of sensitive kernel memory.

  • CVE-2010-1084

    Neil Brown reported an issue in the Bluetooth subsystem that may permit remote attackers to overwrite memory through the creation of large numbers of sockets, resulting in a denial of service.

  • CVE-2010-1086

    Ang Way Chuang reported an issue in the DVB subsystem for Digital TV adapters. By creating a specially-encoded MPEG2-TS frame, a remote attacker could cause the receiver to enter an endless loop, resulting in a denial of service.

  • CVE-2010-1087

    Trond Myklebust reported an issue in the NFS filesystem. A local user may cause an oops by sending a fatal signal during a file truncation operation, resulting in a denial of service.

  • CVE-2010-1088

    Al Viro reported an issue where automount symlinks may not be followed when LOOKUP_FOLLOW is not set. This has an unknown security impact.

  • CVE-2010-1162

    Catalin Marinas reported an issue in the tty subsystem that allows local attackers to cause a kernel memory leak, possibly resulting in a denial of service.

  • CVE-2010-1173

    Chris Guo from Nokia China and Jukka Taimisto and Olli Jarva from Codenomicon Ltd reported an issue in the SCTP subsystem that allows a remote attacker to cause a denial of service using a malformed init package.

  • CVE-2010-1187

    Neil Hormon reported an issue in the TIPC subsystem. Local users can cause a denial of service by way of a NULL pointer dereference by sending datagrams through AF_TIPC before entering network mode.

  • CVE-2010-1437

    Toshiyuki Okajima reported a race condition in the keyring subsystem. Local users can cause memory corruption via keyctl commands that access a keyring in the process of being deleted, resulting in a denial of service.

  • CVE-2010-1446

    Wufei reported an issue with kgdb on the PowerPC architecture, allowing local users to write to kernel memory. Note: this issue does not affect binary kernels provided by Debian. The fix is provided for the benefit of users who build their own kernels from Debian source.

  • CVE-2010-1451

    Brad Spengler reported an issue on the SPARC architecture that allows local users to execute non-executable pages.

This update also includes fixes a regression introduced by a previous update. See the referenced Debian bug page for details.

For the stable distribution (lenny), these problems have been fixed in version 2.6.26-22lenny1.

We recommend that you upgrade your linux-2.6 and user-mode-linux packages.

The user-mode-linux source package was additional rebuilt for compatibility to take advantage of this update. The updated version of the package is 2.6.26-1um-2+22lenny1.

Fixed in:

Debian GNU/Linux 5.0 (lenny)

Architecture-independent component:
HP Precision:
Intel IA-32:
Intel IA-64:
Big-endian MIPS:
Little-endian MIPS:
IBM S/390:
Sun Sparc:

MD5 checksums of the listed files are available in the original advisory.