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Scientific Linux Security Update : kernel on SL7.x x86_64 (20160915)
high Nessus Plugin ID 93557
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Synopsis
The remote Scientific Linux host is missing one or more security updates.Description
Security Fix(es) :- A security flaw was found in the Linux kernel in the mark_source_chains() function in 'net/ipv4/netfilter/ip_tables.c'. It is possible for a user-supplied 'ipt_entry' structure to have a large 'next_offset' field. This field is not bounds checked prior to writing to a counter value at the supplied offset. (CVE-2016-3134, Important)
- A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit systems. This flaw will allow attackers to alter arbitrary kernel memory when unloading a kernel module. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS and CONFIG_NET_NS and the user is granted elevated privileges. (CVE-2016-4997, Important)
- An out-of-bounds heap memory access leading to a Denial of Service, heap disclosure, or further impact was found in setsockopt(). The function call is normally restricted to root, however some processes with cap_sys_admin may also be able to trigger this flaw in privileged container environments. (CVE-2016-4998, Moderate)
Bug Fix(es) :
- In some cases, running the ipmitool command caused a kernel panic due to a race condition in the ipmi message handler. This update fixes the race condition, and the kernel panic no longer occurs in the described scenario.
- Previously, running I/O-intensive operations in some cases caused the system to terminate unexpectedly after a NULL pointer dereference in the kernel. With this update, a set of patches has been applied to the 3w-9xxx and 3w-sas drivers that fix this bug. As a result, the system no longer crashes in the described scenario.
- Previously, the Stream Control Transmission Protocol (SCTP) sockets did not inherit the SELinux labels properly. As a consequence, the sockets were labeled with the unlabeled_t SELinux type which caused SCTP connections to fail. The underlying source code has been modified, and SCTP connections now works as expected.
- Previously, the bnx2x driver waited for transmission completions when recovering from a parity event, which substantially increased the recovery time. With this update, bnx2x does not wait for transmission completion in the described circumstances. As a result, the recovery of bnx2x after a parity event now takes less time.
Enhancement(s) :
- With this update, the audit subsystem enables filtering of processes by name besides filtering by PID. Users can now audit by executable name (with the '-F exe=<path-to-executable>' option), which allows expression of many new audit rules. This functionality can be used to create events when specific applications perform a syscall.
- With this update, the Nonvolatile Memory Express (NVMe) and the multi- queue block layer (blk_mq) have been upgraded to the Linux 4.5 upstream version. Previously, a race condition between timeout and freeing request in blk_mq occurred, which could affect the blk_mq_tag_to_rq() function and consequently a kernel oops could occur. The provided patch fixes this race condition by updating the tags with the active request.
The patch simplifies blk_mq_tag_to_rq() and ensures that the two requests are not active at the same time.
- The Hyper-V storage driver (storvsc) has been upgraded from upstream. This update provides moderate performance improvement of I/O operations when using storvscr for certain workloads.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 93557
File Name: sl_20160915_kernel_on_SL7_x.nasl
Version: 2.10
Type: local
Agent: unix
Published: 9/16/2016
Updated: 1/14/2021
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 8.9
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS v3
Risk Factor: High
Base Score: 8.4
Temporal Score: 8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-tools-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-tools-libs-devel, p-cpe:/a:fermilab:scientific_linux:kernel-doc, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-x86_64, p-cpe:/a:fermilab:scientific_linux:python-perf-debuginfo, p-cpe:/a:fermilab:scientific_linux:perf-debuginfo, p-cpe:/a:fermilab:scientific_linux:perf, p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel, p-cpe:/a:fermilab:scientific_linux:python-perf, p-cpe:/a:fermilab:scientific_linux:kernel, p-cpe:/a:fermilab:scientific_linux:kernel-tools, p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-debug, x-cpe:/o:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:kernel-headers, p-cpe:/a:fermilab:scientific_linux:kernel-devel, p-cpe:/a:fermilab:scientific_linux:kernel-abi-whitelists, p-cpe:/a:fermilab:scientific_linux:kernel-tools-libs
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/15/2016
Vulnerability Publication Date: 4/27/2016
Exploitable With
Metasploit (Linux Kernel 4.6.3 Netfilter Privilege Escalation)