Ubuntu je objavio reviziju preporuke s oznakom USN-1080-2 koja se odnosi na ranjivosti jezgre operacijskog sustava. Izvorna preporuka opisuje sljedeće nepravilnosti: neodgovarajuća implementacija RDS i PPv4 protokola, oslobađanje memorije, inicijalizacija strukture TIPC sučelja, dereferenciranje NULL pokazivača, itd. Napadač može iskorištavanjem propusta izvesti DoS napad, pokrenuti proizvoljan programski kod, povećati prava na sustavu te ostvariti pristup osjetljivim informacijama. Revizija je objavljena zbog nadopune informacija o pravilnoj instalaciji dostupnih programskih rješenja koja se savjetuju na korištenje.

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Ubuntu Security Notice USN-1080-2            March 02, 2011
linux-ec2 vulnerabilities
CVE-2010-3865, CVE-2010-3875, CVE-2010-3876, CVE-2010-3877,
CVE-2010-3880, CVE-2010-4248, CVE-2010-4343, CVE-2010-4346,
CVE-2010-4526, CVE-2010-4527, CVE-2010-4649, CVE-2011-1044
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A security issue affects the following Ubuntu releases:

Ubuntu 10.04 LTS

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 10.04 LTS:
  linux-image-2.6.32-313-ec2      2.6.32-313.26

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

Details follow:

USN-1080-1 fixed vulnerabilities in the Linux kernel. This update provides
the corresponding updates for the Linux kernel for use with EC2.

Original advisory details:

 Thomas Pollet discovered that the RDS network protocol did not check
 certain iovec buffers. A local attacker could exploit this to crash the
 system or possibly execute arbitrary code as the root user. (CVE-2010-3865)
 
 Vasiliy Kulikov discovered that the Linux kernel X.25 implementation did
 not correctly clear kernel memory. A local attacker could exploit this to
 read kernel stack memory, leading to a loss of privacy. (CVE-2010-3875)
 
 Vasiliy Kulikov discovered that the Linux kernel sockets implementation did
 not properly initialize certain structures. A local attacker could exploit
 this to read kernel stack memory, leading to a loss of privacy.
 (CVE-2010-3876)
 
 Vasiliy Kulikov discovered that the TIPC interface did not correctly
 initialize certain structures. A local attacker could exploit this to read
 kernel stack memory, leading to a loss of privacy. (CVE-2010-3877)
 
 Nelson Elhage discovered that the Linux kernel IPv4 implementation did not
 properly audit certain bytecodes in netlink messages. A local attacker
 could exploit this to cause the kernel to hang, leading to a denial of
 service. (CVE-2010-3880)
 
 It was discovered that multithreaded exec did not handle CPU timers
 correctly. A local attacker could exploit this to crash the system, leading
 to a denial of service. (CVE-2010-4248)
 
 Krishna Gudipati discovered that the bfa adapter driver did not correctly
 initialize certain structures. A local attacker could read files in /sys to
 crash the system, leading to a denial of service. (CVE-2010-4343)
 
 Tavis Ormandy discovered that the install_special_mapping function could
 bypass the mmap_min_addr restriction. A local attacker could exploit this
 to mmap 4096 bytes below the mmap_min_addr area, possibly improving the
 chances of performing NULL pointer dereference attacks. (CVE-2010-4346)
 
 It was discovered that the ICMP stack did not correctly handle certain
 unreachable messages. If a remote attacker were able to acquire a socket
 lock, they could send specially crafted traffic that would crash the
 system, leading to a denial of service. (CVE-2010-4526)
 
 Dan Rosenberg discovered that the OSS subsystem did not handle name
 termination correctly. A local attacker could exploit this crash the system
 or gain root privileges. (CVE-2010-4527)
 
 Dan Carpenter discovered that the Infiniband driver did not correctly
 handle certain requests. A local user could exploit this to crash the
 system or potentially gain root privileges. (CVE-2010-4649, CVE-2011-1044)


Updated packages for Ubuntu 10.04 LTS:

  Source archives:

   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-ec2_2.6.32-313.26.diff.gz
      Size/MD5:  9006451 8cdaceb98706fe4a05ae00a5da39b42d
   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-ec2_2.6.32-313.26.dsc
      Size/MD5:     2104 552a2f768dd9ebb658ffa7290d78618f
   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-ec2_2.6.32.orig.tar.gz
      Size/MD5: 81900940 4b1f6f6fac43a23e783079db589fc7e2

  Architecture independent packages:

   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-ec2-doc_2.6.32-313.26_all.deb
      Size/MD5:  6430856 1f1387d40cfc16fbd07b6fbb2ff911ab
   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-ec2-source-2.6.32_2.6.32-313.26_all.deb
      Size/MD5: 68190678 ce725a131a4a4450795d6b7b2ca9b17c
   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-headers-2.6.32-313_2.6.32-313.26_all.deb
      Size/MD5: 10042660 0b79b03ef63f936c4ec70afe1fb9f175

  amd64 architecture (Athlon64, Opteron, EM64T Xeon):

   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-headers-2.6.32-313-ec2_2.6.32-313.26_amd64.deb
      Size/MD5:   691132 4cd99928f8a74ce1860b42d8f092fbd3
   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-image-2.6.32-313-ec2_2.6.32-313.26_amd64.deb
      Size/MD5: 20005422 10cba12c56655afb94862979b703c0b0

  i386 architecture (x86 compatible Intel/AMD):

   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-headers-2.6.32-313-ec2_2.6.32-313.26_i386.deb
      Size/MD5:   656470 c34756e6bff43f09d721b0dbe63cc0a4
   
http://security.ubuntu.com/ubuntu/pool/main/l/linux-ec2/linux-image-2.6.32-313-ec2_2.6.32-313.26_i386.deb
      Size/MD5: 19230428 7dd28c8c0238f99f31bcfab4f9fc8433