The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3871-3 advisory.

  - A flaw was found in Linux kernel in the ext4 filesystem code. A use-after-free is possible in     ext4_ext_remove_space() function when mounting and operating a crafted ext4 image. (CVE-2018-10876)

  - Linux kernel ext4 filesystem is vulnerable to an out-of-bound access in the ext4_ext_drop_refs() function     when operating on a crafted ext4 filesystem image. (CVE-2018-10877)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write and     a denial of service or unspecified other impact is possible by mounting and operating a crafted ext4     filesystem image. (CVE-2018-10878)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause a use-after-free in     ext4_xattr_set_entry function and a denial of service or unspecified other impact may occur by renaming a     file in a crafted ext4 filesystem image. (CVE-2018-10879)

  - Linux kernel is vulnerable to a stack-out-of-bounds write in the ext4 filesystem code when mounting and     writing to a crafted ext4 image in ext4_update_inline_data(). An attacker could use this to cause a system     crash and a denial of service. (CVE-2018-10880)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound write in in     fs/jbd2/transaction.c code, a denial of service, and a system crash by unmounting a crafted ext4     filesystem image. (CVE-2018-10882)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write in     jbd2_journal_dirty_metadata(), a denial of service, and a system crash by mounting and operating on a     crafted ext4 filesystem image. (CVE-2018-10883)

  - A flaw was found in the Linux Kernel where an attacker may be able to have an uncontrolled read to kernel-     memory from within a vm guest. A race condition between connect() and close() function may allow an     attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly intercept or corrupt     AF_VSOCK messages destined to other clients. (CVE-2018-14625)

  - A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts     when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while     processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor     address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash     the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before     4.14.91 and before 4.19.13 are vulnerable. (CVE-2018-16882)

  - An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through     4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a     local attacker to exploit racy stack unwinding and leak kernel task stack contents. (CVE-2018-17972)

  - Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks.
    If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of     mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it     has been released back to the page allocator and reused. This is fixed in the following kernel versions:
    4.9.135, 4.14.78, 4.18.16, 4.19. (CVE-2018-18281)

  - The vcpu_scan_ioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users     to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a     situation where ioapic is uninitialized. (CVE-2018-19407)

  - In hid_debug_events_read of drivers/hid/hid-debug.c, there is a possible out of bounds write due to a     missing bounds check. This could lead to local escalation of privilege with System execution privileges     needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android     ID: A-71361580. (CVE-2018-9516)

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

Detections

Analytics

Ubuntu 18.04 LTS : Linux kernel (AWS, GCP, KVM, OEM, Raspberry Pi 2) vulnerabilities (USN-3871-3)

high Nessus Plugin ID 121593

Version 1.12

Version 1.11

Version 1.11

Version 1.12 Jan 10, 2024, 8:45 AM Plugin metadata Detection (updated detection logic) Plugin Feed: 202401100845
Version 1.11 Oct 21, 2023, 9:06 AM CVSSv3 score source (set to "CVE-2018-16882") Detection Plugin metadata Plugin Feed: 202310210906
Version 1.11 Jan 9, 2024, 6:56 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202401091856