USN-3833-1: Linux kernel (AWS) vulnerabilities

Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. CVE-2018-18955 Philipp Wendler discovered that the overlayfs implementati...

Ubuntu 18.10 : Linux kernel (AWS) vulnerabilities (USN-3832-1)

Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. CVE-2018-17972 Jann Horn discovered that the mremap system...

CVE-2018-18955

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

CVE-2018-18955

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

Input validation

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

CVE-2018-18955

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

CVE-2018-18955

CVE-2018-18955 affects Linux kernels 4.15.x–4.19.x, with privilege escalation via map_write() in kernel/user_namespace.c when nested user namespaces have more than 5 UID/GID ranges. A user with CAP_SYS_ADMIN in the affected namespace can bypass controls outside the namespace (e.g., read /etc/shad...

CVE-2018-18955

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

EUVD-2018-10659

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

CVE-2018-18955

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

Linux - Broken uidgid Mapping for Nested User Namespaces

Linux - Broken uidgid Mapping for Nested User Namespaces commit 6397fac4915a "userns: bump idmap limits to 340" increases the number of possible uid/gid mappings that a namespace can have from 5 to 340. This is implemented by switching to a different data structure if the number of mappings excee...

UBUNTU-CVE-2018-18955

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, mapwrite in kernel/usernamespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAPSYSADMIN in an affected user namespace can bypass access controls on resources...

Linux - Broken uid/gid Mapping for Nested User Namespaces

commit 6397fac4915a "userns: bump idmap limits to 340" increases the number of possible uid/gid mappings that a namespace can have from 5 to 340. This is implemented by switching to a different data structure if the number of mappings exceeds 5: Instead of linear search over an unsorted array of...

Linux - Broken uid/gid Mapping for Nested User Namespaces Exploit

Exploit for linux platform in category local exploits Linux - Broken uid/gid Mapping for Nested User Namespaces Exploit commit 6397fac4915a "userns: bump idmap limits to 340" increases the number of possible uid/gid mappings that a namespace can have from 5 to 340. This is implemented by switchin...

389-ds-base security, bug fix, and enhancement update

1.3.8.4-15 - Bump version to 1.3.8.4-15 - Resolves: Bug 1624004 - Fix regression in last patch 1.3.8.4-14 - Bump version to 1.3.8.4-14 - Resolves: Bug 1624004 - potential denial of service attack 1.3.8.4-13 - Bump version to 1.3.8.4-13 - Resolves: Bug 1623949 - Crash in deletepasswdPolicy when...

Linux systemd Symlink Dereference Via chown_one() Exploit

Linux suffers from an issue with systemd where chownone can dereference symlinks. systemd: chownone can dereference symlinks CVE-2018-15687 I am sending this bug report to Ubuntu, even though it's an upstream bug, as requested at...

FreeBSD : slurm -- insecure handling of user_name and gid fields (3a66cb69-716f-11e8-be54-3085a9a47796)

SchedMD reports : Insecure handling of username and gid fields CVE-2018-10995 While fixes are only available for the supported 17.02 and 17.11 releases, it is believed that similar vulnerabilities do affect past versions as well. The only resolution is to upgrade Slurm to a fixed release. C Tenab...

SchedMD Slurm has an unspecified vulnerability

SchedMD Slurm is SchedMD's open source and highly scalable cluster management and job scheduling system for large and small Linux clusters. A security vulnerability exists in SchedMD Slurm versions prior to 17.02.11 and 17.1x.x prior to 17.11.7, which stems from the program's failure to properly...

slurm -- insecure handling of user_name and gid fields

SchedMD reports: Insecure handling of username and gid fields CVE-2018-10995 While fixes are only available for the supported 17.02 and 17.11 releases, it is believed that similar vulnerabilities do affect past versions as well. The only resolution is to upgrade Slurm to a fixed release...

SUSE-SU-2018:1121-1 Security update for corosync

This update for corosync fixes the following issue: - CVE-2018-1084: Integer overflow in totemcrypto:authenticatenss23 could lead to command execution bsc1089346 - Providing an empty uid or gid results in coroparse adding uid 0. bsc1066585 - Fix a problem with configuration file incompatibilities...