The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3508-2 advisory.

  - The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd()     function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the     pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty     without going through a COW cycle. This bug is not as severe as the original Dirty cow because an ext4     file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite     read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since     their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it     will be replaced with a new fresh (and zeroed) thp. (CVE-2017-1000405)

  - The driver_override implementation in drivers/base/platform.c in the Linux kernel before 4.12.1 allows     local users to gain privileges by leveraging a race condition between a read operation and a store     operation that involve different overrides. (CVE-2017-12146)

  - The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows     local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF     setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages. (CVE-2017-16939)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3508-2)

high Nessus Plugin ID 105103

Version 3.13