The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:2918 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * Out-of-bounds kernel heap access vulnerability was found in xfrm, kernel's IP framework for transforming     packets. An error dealing with netlink messages from an unprivileged user leads to arbitrary read/write     and privilege escalation. (CVE-2017-7184, Important)

    * A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are     implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a     raw packet socket (requires the CAP_NET_RAW capability) could use this flaw to elevate their privileges on     the system. (CVE-2017-1000111, Important)

    * An exploitable memory corruption flaw was found in the Linux kernel. The append path can be erroneously     switched from UFO to non-UFO in ip_ufo_append_data() when building an UFO packet with MSG_MORE option. If     unprivileged user namespaces are available, this flaw can be exploited to gain root privileges.
    (CVE-2017-1000112, Important)

    * Kernel memory corruption due to a buffer overflow was found in brcmf_cfg80211_mgmt_tx() function in     Linux kernels from v3.9-rc1 to v4.13-rc1. The vulnerability can be triggered by sending a crafted     NL80211_CMD_FRAME packet via netlink. This flaw is unlikely to be triggered remotely as certain userspace     code is needed for this. An unprivileged local user could use this flaw to induce kernel memory corruption     on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully     ruled out, although it is unlikely. (CVE-2017-7541, Moderate)

    * An integer overflow vulnerability in ip6_find_1stfragopt() function was found. A local attacker that has     privileges (of CAP_NET_RAW) to open raw socket can cause an infinite loop inside the ip6_find_1stfragopt()     function. (CVE-2017-7542, Moderate)

    * A kernel data leak due to an out-of-bound read was found in the Linux kernel in     inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through     version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export     socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a     userspace. (CVE-2017-7558, Moderate)

    * The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon     entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to possibly     cause a situation where a value may be used after being freed (use-after-free) which may lead to memory     corruption or other unspecified other impact. (CVE-2017-11176, Moderate)

    * A divide-by-zero vulnerability was found in the __tcp_select_window function in the Linux kernel. This     can result in a kernel panic causing a local denial of service. (CVE-2017-14106, Moderate)

    * A flaw was found where the XFS filesystem code mishandles a user-settable inode flag in the Linux kernel     prior to 4.14-rc1. This can cause a local denial of service via a kernel panic. (CVE-2017-14340, Moderate)

    Red Hat would like to thank Chaitin Security Research Lab for reporting CVE-2017-7184; Willem de Bruijn     for reporting CVE-2017-1000111; and Andrey Konovalov for reporting CVE-2017-1000112. The CVE-2017-7558     issue was discovered by Stefano Brivio (Red Hat) and the CVE-2017-14340 issue was discovered by Dave     Chinner (Red Hat).

    Bug Fix(es):

    * kernel-rt packages have been upgraded to the 3.10.0-693.5.2 source tree, which provides number of bug     fixes over the previous version. (BZ#1489085)

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.

Detections

Analytics

RHEL 6 : kernel-rt (RHSA-2017:2918)

high Nessus Plugin ID 104090

Version 3.13