UBUNTU-CVE-2018-6559

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...

CVE-2018-6559

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...

MGASA-2018-0177 Updated shadow-utils packages fix security vulnerability

Privilege escalation in newgidmap, which allowed an unprivileged user to be placed in a user namespace where setgroups2 is allowed CVE-2018-7169...

Updated shadow-utils packages fix security vulnerability

Privilege escalation in newgidmap, which allowed an unprivileged user to be placed in a user namespace where setgroups2 is allowed CVE-2018-7169...

SUSE-SU-2018:0662-1 Security update for shadow

This update for shadow fixes the following issues: - CVE-2018-7169: Fixed an privilege escalation in newgidmap, which allowed an unprivileged user to be placed in a user namespace where setgroups2 is allowed. bsc1081294...

CVE-2018-7169

An issue was discovered in newgidmap, in shadow-utils, that allows an unprivileged user to be placed in a user namespace where setgroups is permitted. An attacker could use this flaw to remove himself from a supplementary group, which may allow access to certain filesystem paths, if the...

CVE-2018-7169

An issue was discovered in shadow 4.5. newgidmap in shadow-utils is setuid and allows an unprivileged user to be placed in a user namespace where setgroups2 is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if...

Privilege escalation

An issue was discovered in shadow 4.5. newgidmap in shadow-utils is setuid and allows an unprivileged user to be placed in a user namespace where setgroups2 is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if...

UBUNTU-CVE-2018-7169

An issue was discovered in shadow 4.5. newgidmap in shadow-utils is setuid and allows an unprivileged user to be placed in a user namespace where setgroups2 is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if...

CVE-2018-7169

An issue was discovered in shadow 4.5. newgidmap in shadow-utils is setuid and allows an unprivileged user to be placed in a user namespace where setgroups2 is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if...

DEBIAN-CVE-2018-7169

An issue was discovered in shadow 4.5. newgidmap in shadow-utils is setuid and allows an unprivileged user to be placed in a user namespace where setgroups2 is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if...

CVE-2018-7169

An issue was discovered in shadow 4.5. newgidmap in shadow-utils is setuid and allows an unprivileged user to be placed in a user namespace where setgroups2 is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if...

OracleVM 3.4 : Unbreakable / etc (OVMSA-2018-0007) (Spectre)

The remote OracleVM system is missing necessary patches to address critical security updates : - x86/ibrs: Remove 'ibrsdump' and remove the prdebug Konrad Rzeszutek Wilk Orabug: 27350825 - kABI: Revert kABI: Make the bootcpudata look normal Konrad Rzeszutek Wilk CVE-2017-5715 - userns: prevent...

Exploiting the Linux kernel via packet sockets

Guest blog post, posted by Andrey Konovalov Introduction Lately I’ve been spending some time fuzzing network-related Linux kernel interfaces with syzkaller. Besides the recently discovered vulnerability in DCCP sockets, I also found another one, this time in packet sockets. This post describes ho...

Ubuntu PT Chown Privilege Escalation

Source: http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/ Introduction Problem description: With Ubuntu Wily and earlier, /usr/lib/ptchown was used to change ownership of slave pts devices in /dev/pts to the same uid holding the master file descriptor for the slave...

Ubuntu 14.04/15.10 - User Namespace Overlayfs Xattr Setgid Privilege Escalation Vulnerability

Exploit for linux platform in category local exploits Source: http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Introduction Problem description: Linux user namespace allows to mount file systems as normal user, including the overlayfs. As many of those...

Ubuntu 14.0415.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation

Ubuntu 14.0415.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation Source: http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Introduction Problem description: Linux user namespace allows to mount file systems as normal user, including the...

Ubuntu 14.04/15.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation

Source: http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Introduction Problem description: Linux user namespace allows to mount file systems as normal user, including the overlayfs. As many of those features were not designed with namespaces in mind, this...

kernel: compat IPT_SO_SET_REPLACE setsockopt

A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit systems. This flaw will allow attackers to alter arbitrary kernel memory when unloading a kernel module. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled wit...

kernel: compat IPT_SO_SET_REPLACE setsockopt

A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit systems. This flaw will allow attackers to alter arbitrary kernel memory when unloading a kernel module. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled wit...