The fs/ext4/inline.c:ext4_read_inline_data() function in the Linux kernel performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode. The unbound copy can cause memory corruption or possible privilege escalation.
(CVE-2018-11412)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:0525 advisory.

  - kernel: use-after-free in jbd2_journal_commit_transaction funtion (CVE-2018-10876)

  - kernel: out-of-bounds memcpy in fs/ext4/inline.c:ext4_read_inline_data() with crafted ext4 image     (CVE-2018-11412)

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

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3752-1 advisory.

  - The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out     of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process's final     thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen     synchronously with the oom reaper's unmap_page_range() since the vma's VM_LOCKED bit is cleared before     munlocking (to determine if any other vmas share the memory and are mlocked). (CVE-2018-1000200)

  - Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with     dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel     heap pages to the userspace. This has been fixed upstream in     https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has     limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the     Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties     dispute the relevance of this report, noting that the requirement for an attacker to have both the     CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it virtually impossible to exploit. (CVE-2018-1000204)

  - The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3     allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted     xfs image. (CVE-2018-10323)

  - Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry()     function. An attacker could exploit this by operating on a mounted crafted ext4 image. (CVE-2018-10840)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound access in     ext4_get_group_info function, a denial of service, and a system crash by mounting and operating on a     crafted ext4 filesystem image. (CVE-2018-10881)

  - The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows     attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image     because balloc.c and ialloc.c do not validate bitmap block numbers. (CVE-2018-1093)

  - kernel drivers before version 4.17-rc1 are vulnerable to a weakness in the Linux kernel's implementation     of random seed data. Programs, early in the boot sequence, could use the data allocated for the seed     before it was sufficiently generated. (CVE-2018-1108)

  - A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a     process's memory containing command line arguments (or environment strings), an attacker can cause     utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the     /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some     controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

  - In the Linux kernel 4.13 through 4.16.11, ext4_read_inline_data() in fs/ext4/inline.c performs a memcpy     with an untrusted length value in certain circumstances involving a crafted filesystem that stores the     system.data extended attribute value in a dedicated inode. (CVE-2018-11412)

  - The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users     to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact     because sense buffers have different sizes at the CDROM layer and the SCSI layer, as demonstrated by a     CDROMREADMODE2 ioctl call. (CVE-2018-11506)

  - In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close     in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr     functions. fchownat does not increment the file descriptor reference count, which allows close to set the     socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.
    (CVE-2018-12232)

  - In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in     JFS can be triggered by calling setxattr twice with two different extended attribute names on the same     file. This vulnerability can be triggered by an unprivileged user with the ability to create files and     execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.
    (CVE-2018-12233)

  - In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local     attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of     service attacks due to lack of checking of CPL. (CVE-2018-12904)

  - An issue was discovered in fs/xfs/libxfs/xfs_attr_leaf.c in the Linux kernel through 4.17.3. An OOPS may     occur for a corrupted xfs image after xfs_da_shrink_inode() is called with a NULL bp. (CVE-2018-13094)

  - The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create     files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and     is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a     plain file whose group ownership is that group. The intended behavior was that the non-member can trigger     creation of a directory (but not a plain file) whose group ownership is that group. The non-member can     escalate privileges by making the plain file executable and SGID. (CVE-2018-13405)

  - An integer overflow in the uvesafb_setcmap function in drivers/video/fbdev/uvesafb.c in the Linux kernel     before 4.17.4 could result in local attackers being able to crash the kernel or potentially elevate     privileges because kmalloc_array is not used. (CVE-2018-13406)

  - In the Linux Kernel before version 4.16.11, 4.14.43, 4.9.102, and 4.4.133, multiple race condition errors     when handling probe, disconnect, and rebind operations can be exploited to trigger a use-after-free     condition or a NULL pointer dereference by sending multiple USB over IP packets. (CVE-2018-5814)

  - In driver_override_store and driver_override_show of bus.c, there is a possible double free due to     improper locking. 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-69129004 References: Upstream kernel. (CVE-2018-9415)

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

The 4.17.2 kernel rebase contains new drivers, new features, and a number of important fixes across the tree.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3752-2 advisory.

  - The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out     of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process's final     thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen     synchronously with the oom reaper's unmap_page_range() since the vma's VM_LOCKED bit is cleared before     munlocking (to determine if any other vmas share the memory and are mlocked). (CVE-2018-1000200)

  - Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with     dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel     heap pages to the userspace. This has been fixed upstream in     https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has     limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the     Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties     dispute the relevance of this report, noting that the requirement for an attacker to have both the     CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it virtually impossible to exploit. (CVE-2018-1000204)

  - The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3     allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted     xfs image. (CVE-2018-10323)

  - Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry()     function. An attacker could exploit this by operating on a mounted crafted ext4 image. (CVE-2018-10840)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound access in     ext4_get_group_info function, a denial of service, and a system crash by mounting and operating on a     crafted ext4 filesystem image. (CVE-2018-10881)

  - The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows     attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image     because balloc.c and ialloc.c do not validate bitmap block numbers. (CVE-2018-1093)

  - kernel drivers before version 4.17-rc1 are vulnerable to a weakness in the Linux kernel's implementation     of random seed data. Programs, early in the boot sequence, could use the data allocated for the seed     before it was sufficiently generated. (CVE-2018-1108)

  - A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a     process's memory containing command line arguments (or environment strings), an attacker can cause     utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the     /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some     controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

  - In the Linux kernel 4.13 through 4.16.11, ext4_read_inline_data() in fs/ext4/inline.c performs a memcpy     with an untrusted length value in certain circumstances involving a crafted filesystem that stores the     system.data extended attribute value in a dedicated inode. (CVE-2018-11412)

  - The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users     to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact     because sense buffers have different sizes at the CDROM layer and the SCSI layer, as demonstrated by a     CDROMREADMODE2 ioctl call. (CVE-2018-11506)

  - In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close     in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr     functions. fchownat does not increment the file descriptor reference count, which allows close to set the     socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.
    (CVE-2018-12232)

  - In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in     JFS can be triggered by calling setxattr twice with two different extended attribute names on the same     file. This vulnerability can be triggered by an unprivileged user with the ability to create files and     execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.
    (CVE-2018-12233)

  - In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local     attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of     service attacks due to lack of checking of CPL. (CVE-2018-12904)

  - An issue was discovered in fs/xfs/libxfs/xfs_attr_leaf.c in the Linux kernel through 4.17.3. An OOPS may     occur for a corrupted xfs image after xfs_da_shrink_inode() is called with a NULL bp. (CVE-2018-13094)

  - The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create     files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and     is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a     plain file whose group ownership is that group. The intended behavior was that the non-member can trigger     creation of a directory (but not a plain file) whose group ownership is that group. The non-member can     escalate privileges by making the plain file executable and SGID. (CVE-2018-13405)

  - An integer overflow in the uvesafb_setcmap function in drivers/video/fbdev/uvesafb.c in the Linux kernel     before 4.17.4 could result in local attackers being able to crash the kernel or potentially elevate     privileges because kmalloc_array is not used. (CVE-2018-13406)

  - In the Linux Kernel before version 4.16.11, 4.14.43, 4.9.102, and 4.4.133, multiple race condition errors     when handling probe, disconnect, and rebind operations can be exploited to trigger a use-after-free     condition or a NULL pointer dereference by sending multiple USB over IP packets. (CVE-2018-5814)

  - In driver_override_store and driver_override_show of bus.c, there is a possible double free due to     improper locking. 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-69129004 References: Upstream kernel. (CVE-2018-9415)

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

The fs/ext4/inline.c:ext4_read_inline_data() function in the Linux kernel performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode. The unbound copy can cause memory corruption or possible privilege escalation.(CVE-2018-11412)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3752-3 advisory.

  - The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out     of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process's final     thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen     synchronously with the oom reaper's unmap_page_range() since the vma's VM_LOCKED bit is cleared before     munlocking (to determine if any other vmas share the memory and are mlocked). (CVE-2018-1000200)

  - Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with     dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel     heap pages to the userspace. This has been fixed upstream in     https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has     limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the     Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties     dispute the relevance of this report, noting that the requirement for an attacker to have both the     CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it virtually impossible to exploit. (CVE-2018-1000204)

  - The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3     allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted     xfs image. (CVE-2018-10323)

  - Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry()     function. An attacker could exploit this by operating on a mounted crafted ext4 image. (CVE-2018-10840)

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound access in     ext4_get_group_info function, a denial of service, and a system crash by mounting and operating on a     crafted ext4 filesystem image. (CVE-2018-10881)

  - The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows     attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image     because balloc.c and ialloc.c do not validate bitmap block numbers. (CVE-2018-1093)

  - kernel drivers before version 4.17-rc1 are vulnerable to a weakness in the Linux kernel's implementation     of random seed data. Programs, early in the boot sequence, could use the data allocated for the seed     before it was sufficiently generated. (CVE-2018-1108)

  - A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a     process's memory containing command line arguments (or environment strings), an attacker can cause     utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the     /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some     controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

  - In the Linux kernel 4.13 through 4.16.11, ext4_read_inline_data() in fs/ext4/inline.c performs a memcpy     with an untrusted length value in certain circumstances involving a crafted filesystem that stores the     system.data extended attribute value in a dedicated inode. (CVE-2018-11412)

  - The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users     to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact     because sense buffers have different sizes at the CDROM layer and the SCSI layer, as demonstrated by a     CDROMREADMODE2 ioctl call. (CVE-2018-11506)

  - In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close     in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr     functions. fchownat does not increment the file descriptor reference count, which allows close to set the     socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.
    (CVE-2018-12232)

  - In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in     JFS can be triggered by calling setxattr twice with two different extended attribute names on the same     file. This vulnerability can be triggered by an unprivileged user with the ability to create files and     execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.
    (CVE-2018-12233)

  - In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local     attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of     service attacks due to lack of checking of CPL. (CVE-2018-12904)

  - An issue was discovered in fs/xfs/libxfs/xfs_attr_leaf.c in the Linux kernel through 4.17.3. An OOPS may     occur for a corrupted xfs image after xfs_da_shrink_inode() is called with a NULL bp. (CVE-2018-13094)

  - The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create     files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and     is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a     plain file whose group ownership is that group. The intended behavior was that the non-member can trigger     creation of a directory (but not a plain file) whose group ownership is that group. The non-member can     escalate privileges by making the plain file executable and SGID. (CVE-2018-13405)

  - An integer overflow in the uvesafb_setcmap function in drivers/video/fbdev/uvesafb.c in the Linux kernel     before 4.17.4 could result in local attackers being able to crash the kernel or potentially elevate     privileges because kmalloc_array is not used. (CVE-2018-13406)

  - In the Linux Kernel before version 4.16.11, 4.14.43, 4.9.102, and 4.4.133, multiple race condition errors     when handling probe, disconnect, and rebind operations can be exploited to trigger a use-after-free     condition or a NULL pointer dereference by sending multiple USB over IP packets. (CVE-2018-5814)

  - In driver_override_store and driver_override_show of bus.c, there is a possible double free due to     improper locking. 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-69129004 References: Upstream kernel. (CVE-2018-9415)

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

ID	Name	Product	Family	Published	Updated	Severity
111337	Amazon Linux AMI : kernel (ALAS-2018-1046)	Nessus	Amazon Linux Local Security Checks	7/26/2018	4/5/2019	medium
122807	RHEL 7 : kernel-alt (RHSA-2019:0525)	Nessus	Red Hat Local Security Checks	3/13/2019	2/7/2024	medium
112109	Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-3752-1)	Nessus	Ubuntu Local Security Checks	8/24/2018	1/9/2024	high
120318	Fedora 28 : kernel / kernel-tools (2018-2c6bd93875)	Nessus	Fedora Local Security Checks	1/3/2019	1/6/2021	medium
112110	Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3752-2)	Nessus	Ubuntu Local Security Checks	8/24/2018	1/9/2024	high
111334	Amazon Linux 2 : kernel (ALAS-2018-1046)	Nessus	Amazon Linux Local Security Checks	7/26/2018	4/5/2019	medium
112189	Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel (Azure, GCP, OEM) vulnerabilities (USN-3752-3)	Nessus	Ubuntu Local Security Checks	8/30/2018	1/9/2024	high

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