Executive Summary

Summary
Title kernel security and bug fix update
Informations
Name RHSA-2015:1643 First vendor Publication 2015-08-18
Vendor RedHat Last vendor Modification 2015-08-18
Severity (Vendor) Moderate Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score 4.9 Attack Range Local
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated kernel packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 6.4 Advanced Update Support.

Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 6.4) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - i386, ppc64, s390x, x86_64

3. Description:

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

* It was found that the Linux kernel's ping socket implementation did not properly handle socket unhashing during spurious disconnects, which could lead to a use-after-free flaw. On x86-64 architecture systems, a local user able to create ping sockets could use this flaw to crash the system. On non-x86-64 architecture systems, a local user able to create ping sockets could use this flaw to escalate their privileges on the system. (CVE-2015-3636, Moderate)

This update also fixes the following bugs:

* Due to bad memory or memory corruption, an isolated BUG_ON(mm->nr_ptes) was sometimes reported, indicating that not all the page tables allocated could be found and freed when the exit_mmap() function cleared the user address space. As a consequence, a kernel panic occurred. To fix this bug, the BUG_ON() function has been replaced by WARN_ON(), which prevents the kernel from panicking in the aforementioned situation. (BZ#1235929)

* Previously, it was for the ext4 driver to read a metadata block and use it without a verification. If the metadata block was corrupted, a kernel panic could occur. With this update, verification is forced on every buffer before it is used, which uncovers possible corruption and prevents further use of the corrupted metadata buffer. (BZ#1242930)

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

4. Solution:

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1218074 - CVE-2015-3636 kernel: ping sockets: use-after-free leading to local privilege escalation

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2015-1643.html

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 1
Os 1
Os 2264
Os 1

Nessus® Vulnerability Scanner

Date Description
2017-04-03 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0057.nasl - Type : ACT_GATHER_INFO
2016-03-18 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2016-0037.nasl - Type : ACT_GATHER_INFO
2016-02-03 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-124.nasl - Type : ACT_GATHER_INFO
2015-09-09 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL17246.nasl - Type : ACT_GATHER_INFO
2015-09-03 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-1478-1.nasl - Type : ACT_GATHER_INFO
2015-08-31 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1565.nasl - Type : ACT_GATHER_INFO
2015-08-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1643.nasl - Type : ACT_GATHER_INFO
2015-08-12 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1583.nasl - Type : ACT_GATHER_INFO
2015-08-11 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2015-1534.nasl - Type : ACT_GATHER_INFO
2015-08-06 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1564.nasl - Type : ACT_GATHER_INFO
2015-08-06 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1534.nasl - Type : ACT_GATHER_INFO
2015-08-06 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2015-1534.nasl - Type : ACT_GATHER_INFO
2015-07-21 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2015-0094.nasl - Type : ACT_GATHER_INFO
2015-07-16 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20150714_kernel_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2015-07-16 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2015-1221.nasl - Type : ACT_GATHER_INFO
2015-07-15 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1221.nasl - Type : ACT_GATHER_INFO
2015-07-15 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2015-1221.nasl - Type : ACT_GATHER_INFO
2015-07-06 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-1174-1.nasl - Type : ACT_GATHER_INFO
2015-06-19 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3290.nasl - Type : ACT_GATHER_INFO
2015-06-17 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-1071-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2638-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2637-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2636-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2635-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2634-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2633-1.nasl - Type : ACT_GATHER_INFO
2015-06-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2631-1.nasl - Type : ACT_GATHER_INFO
2015-05-18 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2015-523.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2015-08-21 13:20:36
  • Multiple Updates
2015-08-19 00:22:37
  • First insertion