canonical ubuntu linux 16.04 vulnerabilities and exploits

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cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass inten...

Canonical Snapd Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04 Canonical Ubuntu Linux 19.10 Canonical Ubuntu Linux 20.04

Canonical snapd before version 2.37.1 incorrectly performed socket owner validation, allowing an malicious user to run arbitrary commands as root. This issue affects: Canonical snapd versions before 2.37.1.

Canonical Snapd Canonical Ubuntu Linux 14.04 Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04 Canonical Ubuntu Linux 18.10

2 EDB exploits5 Github repositories1 Article

The unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c in the Linux kernel up to and including 4.15.8 does not validate certain resource availability, which allows local users to cause a denial of service (NULL pointer dereference).

Linux Linux Kernel Canonical Ubuntu Linux 14.04 Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 17.10

The compat_get_timex function in kernel/compat.c in the Linux kernel prior to 4.16.9 allows local users to obtain sensitive information from kernel memory via adjtimex.

Linux Linux Kernel Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 17.10 Canonical Ubuntu Linux 18.04

1 EDB exploit

An issue exists in fs/xfs/libxfs/xfs_attr_leaf.c in the Linux kernel up to and including 4.17.3. An OOPS may occur for a corrupted xfs image after xfs_da_shrink_inode() is called with a NULL bp.

Linux Linux Kernel Canonical Ubuntu Linux 14.04 Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04

In the Linux kernel 4.15.x up to and including 4.19.x prior to 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace ca...

Linux Linux Kernel Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04 Canonical Ubuntu Linux 18.10

5 EDB exploits6 Github repositories

The Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normally be able to access via an overlayfs mount inside of a user namespace.

Linux Linux Kernel -Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04 Canonical Ubuntu Linux 18.10

In the ea_get function in fs/jfs/xattr.c in the Linux kernel up to and including 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 ...

Linux Linux Kernel Canonical Ubuntu Linux 14.04 Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04

Integer overflow in the xt_alloc_table_info function in net/netfilter/x_tables.c in the Linux kernel up to and including 4.5.2 on 32-bit platforms allows local users to gain privileges or cause a denial of service (heap memory corruption) via an IPT_SO_SET_REPLACE setsockopt call...

Linux Linux Kernel Canonical Ubuntu Linux 14.04 Canonical Ubuntu Linux 15.10 Canonical Ubuntu Linux 16.04

1 EDB exploit5 Github repositories

An issue exists in the Linux kernel prior to 5.0.10. SMB2_negotiate in fs/cifs/smb2pdu.c has an out-of-bounds read because data structures are incompletely updated after a change from smb30 to smb21.

Linux Linux Kernel Canonical Ubuntu Linux 14.04 Canonical Ubuntu Linux 16.04 Canonical Ubuntu Linux 18.04

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