Patch  oval:com.redhat.rhsa:def:20171616
RHSA-2017:1616: kernel-rt security and bug fix update (Important)  

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult. (CVE-2017-1000364, Important)
* A flaw was found in the way Linux kernel allocates heap memory to build the scattergather list from a fragment list(skb_shinfo(skb)->frag_list) in the socket buffer(skb_buff). The heap overflow occurred if 'MAX_SKB_FRAGS + 1' parameter and 'NETIF_F_FRAGLIST' feature are both used together. A remote user or process could use this flaw to potentially escalate their privilege on a system. (CVE-2017-7477, Important)
* The NFS2/3 RPC client could send long arguments to the NFS server. These encoded arguments are stored in an array of memory pages, and accessed using pointer variables. Arbitrarily long arguments could make these pointers point outside the array and cause an out-of-bounds memory access. A remote user or program could use this flaw to crash the kernel, resulting in denial of service. (CVE-2017-7645, Important)
* The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lacked certain checks for the end of a buffer. A remote attacker could trigger a pointer-arithmetic error or possibly cause other unspecified impacts using crafted requests related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c. (CVE-2017-7895, Important)
* Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support was vulnerable to an incorrect segment selector(SS) value error. The error could occur while loading values into the SS register in long mode. A user or process inside a guest could use this flaw to crash the guest, resulting in DoS or potentially escalate their privileges inside the guest. (CVE-2017-2583, Moderate)
* A flaw was found in the Linux kernel's handling of packets with the URG flag. Applications using the splice() and tcp_splice_read() functionality could allow a remote attacker to force the kernel to enter a condition in which it could loop indefinitely. (CVE-2017-6214, Moderate)
Red Hat would like to thank Qualys Research Labs for reporting CVE-2017-1000364; Ari Kauppi for reporting CVE-2017-7895; and Xiaohan Zhang (Huawei Inc.) for reporting CVE-2017-2583.
Bug Fix(es):
* The kernel-rt packages have been upgraded to the 3.10.0-514.25.2 source tree, which provides a number of bug fixes over the previous version. (BZ#1452742)
* Previously, a local lock acquisition around the ip_send_unicast_reply() function was incorrectly terminated. Consequently, a list corruption occurred that led to a kernel panic. This update adds locking functions around calls to ip_send_unicast_reply(). As a result, neither list corruption nor kernel panic occur under the described circumstances. (BZ#1455239)
Create Date: 2017-06-28 Last Update Date: 2017-06-28

Affected Platforms/Products

Affected Products (CPE + CVE references)
Platforms: unix (from OVAL definitions)
  • Red Hat Enterprise Linux 7

References

Criteria

The patch should be installed
IF : All of the following are true
IF : Any one of the following are true
IF : All of the following are true
IF : kernel-rt-trace-kvm is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616017. Please see help for possible reasons
IF : kernel-rt-trace-kvm is signed with Red Hat redhatrelease2 key
WARNING! Unknown test oval:com.redhat.rhsa:tst:20152411014. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-debug is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt-debug is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727009 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt-debug is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616015. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-trace-devel is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt-trace-devel is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727007 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt-trace-devel is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616011. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-trace is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt-trace is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727006 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt-trace is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616009. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-kvm is signed with Red Hat redhatrelease2 key
WARNING! Unknown test oval:com.redhat.rhsa:tst:20152411024. Please see help for possible reasons
IF : kernel-rt-kvm is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616019. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-doc is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt-doc is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727013 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt-doc is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616005. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-devel is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt-devel is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727008 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt-devel is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616021. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-debug-kvm is signed with Red Hat redhatrelease2 key
WARNING! Unknown test oval:com.redhat.rhsa:tst:20152411008. Please see help for possible reasons
IF : kernel-rt-debug-kvm is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616023. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt-debug-devel is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt-debug-devel is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727010 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt-debug-devel is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616007. Please see help for possible reasons
IF : All of the following are true
IF : kernel-rt is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  kernel-rt is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20150727005 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : kernel-rt is earlier than 0:3.10.0-514.26.1.rt56.442.el7
WARNING! Unknown test oval:com.redhat.rhsa:tst:20171616013. Please see help for possible reasons
IF : Any one of the following are true
IF : Red Hat Enterprise Linux 7 ComputeNode is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 ComputeNode is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842004 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 7 Workstation is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 Workstation is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842003 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 7 Server is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 Server is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842002 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 7 Client is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 Client is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842001 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 

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