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RHEL 7 : kernel-rt (RHSA-2015:1977)
medium Nessus Plugin ID 86717
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Synopsis
The remote Red Hat host is missing one or more security updates.Description
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2015:1977 advisory.The kernel packages contain the Linux kernel, the core of any Linux operating system.
* A flaw was found in the way the Linux kernel's VFS subsystem handled file system locks. A local, unprivileged user could use this flaw to trigger a deadlock in the kernel, causing a denial of service on the system.
(CVE-2014-8559, Moderate)
* A buffer overflow flaw was found in the way the Linux kernel's virtio-net subsystem handled certain fraglists when the GRO (Generic Receive Offload) functionality was enabled in a bridged network configuration. An attacker on the local network could potentially use this flaw to crash the system, or, although unlikely, elevate their privileges on the system.
(CVE-2015-5156, Moderate)
The CVE-2015-5156 issue was discovered by Jason Wang of Red Hat.
The kernel-rt packages have been upgraded to version 3.10.0-229.20.1, which provides a number of bug fixes and enhancements over the previous version, including:
* Unexpected completion is detected on Intel Ethernet x540
* Divide by zero error in intel_pstate_timer_func() [ inline s64 div_s64_rem() ]
* NFS Recover from stateid-type error on SETATTR
* pNFS RHEL 7.1 Data Server connection remains after umount due to lseg refcount leak
* Race during NFS v4.0 recovery and standard IO.
* Fix ip6t_SYNPROXY for namespaces and connection delay
* synproxy window size and sequence number behaviour causes long connection delay
* Crash in kmem_cache_alloc() during disk stress testing (using ipr)
* xfs: sync/backport to upstream v4.1
* iscsi_session recovery_tmo revert back to default when a path becomes active
* read from MD raid1 can fail if read from resync target fails
* backport scsi-mq
* unable to handle kernel paging request at 0000000000237037 [zswap]
(BZ#1266915)
All kernel-rt users are advised to upgrade to these updated packages, which correct these issues and add this enhancement. The system must be rebooted for this update to take effect.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
http://www.nessus.org/u?49697bd0
https://access.redhat.com/errata/RHSA-2015:1977
https://access.redhat.com/security/updates/classification/#moderate
https://bugzilla.redhat.com/show_bug.cgi?id=1159313
Plugin Details
Severity: Medium
ID: 86717
File Name: redhat-RHSA-2015-1977.nasl
Version: 2.9
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 11/4/2015
Updated: 4/15/2025
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 4.8
Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2015-5156
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2014-8559
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Patch Publication Date: 11/3/2015
Vulnerability Publication Date: 11/10/2014
Reference Information
CVE: CVE-2014-8559, CVE-2015-5156