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computer vulnerability announce for Linux kernel: use after free via ping_unhash - CVE-2015-3636

Synthesis of the vulnerability

A local attacker can force the usage of a freed memory area in ping_unhash() of the Linux kernel, in order to trigger a denial of service, and possibly to execute code.
Severity of this announce: 2/4.
Creation date: 04/05/2015.
Références of this computer vulnerability: CERTFR-2015-AVI-254, CERTFR-2015-AVI-261, CERTFR-2015-AVI-328, CERTFR-2015-AVI-357, CVE-2015-3636, DSA-3290-1, FEDORA-2015-7736, FEDORA-2015-8518, K17246, openSUSE-SU-2015:1382-1, openSUSE-SU-2016:0301-1, RHSA-2015:1221-01, RHSA-2015:1534-01, RHSA-2015:1564-01, RHSA-2015:1565-01, RHSA-2015:1583-01, RHSA-2015:1643-01, SOL17246, SUSE-SU-2015:1071-1, SUSE-SU-2015:1224-1, SUSE-SU-2015:1376-1, SUSE-SU-2015:1478-1, USN-2631-1, USN-2632-1, USN-2633-1, USN-2634-1, USN-2635-1, USN-2636-1, USN-2637-1, USN-2638-1, VIGILANCE-VUL-16801.
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Description of the vulnerability

The Linux kernel supports sockets of type ping:
  socket(PF_INET, SOCK_DGRAM, IPPROTO_ICMP)
The access to these sockets is usually restricted.

However, if the user disconnects, and the connects the socket, the ping_unhash() function frees a memory area before reusing it.

A local attacker can therefore force the usage of a freed memory area in ping_unhash() of the Linux kernel, in order to trigger a denial of service, and possibly to execute code.
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This cybersecurity bulletin impacts software or systems such as Debian, BIG-IP Hardware, TMOS, Fedora, Android OS, Linux, openSUSE, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity weakness is medium.

The trust level is of type confirmed by the editor, with an origin of privileged shell.

An attacker with a expert ability can exploit this computer vulnerability bulletin.

Solutions for this threat

Linux kernel: patch for ping_unhash.
A patch is available in information sources.

Debian 8: new linux packages.
New packages are available:
  Debian 7: linux 3.16.7-ckt11-1

F5 BIG-IP: fixed versions for kernel CVE-2015-3636.
Fixed versions are indicated in information sources.

Fedora 20: new kernel packages.
New packages are available:
  Fedora 20: kernel 3.19.8-100.fc20

Fedora 21: new kernel packages.
New packages are available:
  Fedora 21: kernel 3.19.7-200.fc21

Google Android OS: patch for nine vulnerabilities of September 2015.
A patch is indicated in information sources.

MRG Realtime for RHEL 6: new kernel-rt packages.
New packages are available:
  RHEL 6: kernel-rt 3.10.0-229.rt56.158.el6rt

openSUSE 13.1: new kernel packages (01/02/2016).
New packages are available:
  openSUSE 13.1: kernel 3.11.10-32.1

openSUSE 13.2: new kernel packages (14/08/2015).
New packages are available:
  openSUSE 13.2: kernel 3.16.7-24.1

RHEL 6.4: new kernel packages.
New packages are available:
  RHEL 6: kernel 2.6.32-358.65.1.el6

RHEL 6.5: new kernel packages.
New packages are available:
  RHEL 6: kernel 2.6.32-431.61.2.el6

RHEL 6: new kernel packages.
New packages are available:
  RHEL 6: kernel 2.6.32-504.30.3.el6

RHEL 7.1: new kernel-rt packages.
New packages are available:
  RHEL 7: kernel-rt 3.10.0-229.11.1.rt56.141.11.el7_1

RHEL 7: new kernel packages.
New packages are available:
  RHEL 7: kernel 3.10.0-229.11.1.el7

SUSE LE 11: new kernel-rt packages (13/08/2015).
New packages are available:
  SUSE LE 11 SP3: kernel-rt 3.0.101.rt130-0.33.38.1

SUSE LE 11 SP2: new kernel packages.
New packages are available:
  SUSE LE 11 SP2: kernel 3.0.101-0.7.37.1

SUSE LE 11-SP3-TERADATA: new kernel packages.
New packages are available:
  SUSE LE 11: kernel 3.0.101-57.TDC.2

SUSE LE 12: new kernel packages (16/06/2015).
New packages are available:
  SUSE LE 12: kernel default-3.12.43-52.6.1

Ubuntu 12.04: new linux-image-3.2.0-85 packages.
New packages are available:
  Ubuntu 12.04 LTS: linux-image-3.2.0-85-generic 3.2.0-85.122, linux-image-3.2.0-1465-omap4 3.2.0-1465.85

Ubuntu 14.10: new linux-image-3.16.0-39 packages.
New packages are available:
  Ubuntu 14.10: linux-image-3.16.0-39-generic 3.16.0-39.53

Ubuntu: new linux-image 3.13 packages.
New packages are available:
  Ubuntu 12.04 LTS: linux-image-3.13.0-54-generic 3.13.0-54.91~precise1
  Ubuntu 14.04 LTS: linux-image-3.13.0-54-generic 3.13.0-54.91

Ubuntu: new linux-image 3.16 packages.
New packages are available:
  Ubuntu 14.04 LTS: linux-image-3.16.0-39-generic 3.16.0-39.53~14.04.1

Ubuntu: new linux-image-3.19.0-20 packages.
New packages are available:
  Ubuntu 15.04: linux-image-3.19.0-20-generic 3.19.0-20.20
  Ubuntu 14.04 LTS: linux-image-3.19.0-20-generic 3.19.0-20.20~14.04.1
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