USN-3422-1: Linux kernel vulnerabilities

It was discovered that a buffer overflow existed in the Bluetooth stack of the Linux kernel when handling L2CAP configuration responses. A physically proximate attacker could use this to cause a denial of service system crash. CVE-2017-1000251 It was discovered that the asynchronous I/O aio...

kernel: S_ISGD is not cleared when setting posix ACLs in tmpfs (CVE-2016-7097 incomplete fix)

A vulnerability was found in the Linux kernel in 'tmpfs' file system. When file permissions are modified via 'chmod' and the user is not in the owning group or capable of CAPFSETID, the setgid bit is cleared in inodechangeok. Setting a POSIX ACL via 'setxattr' sets the file permissions as well as...

kernel: Setting a POSIX ACL via setxattr doesn't clear the setgid bit

It was found that when file permissions were modified via chmod and the user modifying them was not in the owning group or capable of CAPFSETID, the setgid bit would be cleared. Setting a POSIX ACL via setxattr sets the file permissions as well as the new ACL, but doesn't clear the setgid bit in ...

kernel: Setting a POSIX ACL via setxattr doesn't clear the setgid bit

It was found that when file permissions were modified via chmod and the user modifying them was not in the owning group or capable of CAPFSETID, the setgid bit would be cleared. Setting a POSIX ACL via setxattr sets the file permissions as well as the new ACL, but doesn't clear the setgid bit in ...

kernel: S_ISGD is not cleared when setting posix ACLs in tmpfs (CVE-2016-7097 incomplete fix)

A vulnerability was found in the Linux kernel in 'tmpfs' file system. When file permissions are modified via 'chmod' and the user is not in the owning group or capable of CAPFSETID, the setgid bit is cleared in inodechangeok. Setting a POSIX ACL via 'setxattr' sets the file permissions as well as...

kernel: Setting a POSIX ACL via setxattr doesn't clear the setgid bit

It was found that when file permissions were modified via chmod and the user modifying them was not in the owning group or capable of CAPFSETID, the setgid bit would be cleared. Setting a POSIX ACL via setxattr sets the file permissions as well as the new ACL, but doesn't clear the setgid bit in ...

kernel: S_ISGD is not cleared when setting posix ACLs in tmpfs (CVE-2016-7097 incomplete fix)

A vulnerability was found in the Linux kernel in 'tmpfs' file system. When file permissions are modified via 'chmod' and the user is not in the owning group or capable of CAPFSETID, the setgid bit is cleared in inodechangeok. Setting a POSIX ACL via 'setxattr' sets the file permissions as well as...

Linux Kernel (Debian 7/8/9/10 / Fedora 23/24/25 / CentOS 5.3/5.11/6.0/6.8/7.2.1511) - ldso_hwcap Loc

Exploit for linux platform in category local exploits / Linuxldsohwcap.c for CVE-2017-1000366, CVE-2017-1000370 Copyright C 2017 Qualys, Inc. myimportanthwcaps adapted from elf/dl-hwcaps.c, part of the GNU C Library: Copyright C 2012-2017 Free Software Foundation, Inc. This program is free...

Linux Kernel (Debian 78910 Fedora 232425 CentOS 5.35.116.06.87.2.1511) - ldso_hwcap Stack Clash Local Privilege Escalation

Linux Kernel Debian 78910 Fedora 232425 CentOS 5.35.116.06.87.2.1511 - ldsohwcap Stack Clash Local Privilege Escalation / Linuxldsohwcap.c for CVE-2017-1000366, CVE-2017-1000370 Copyright C 2017 Qualys, Inc. myimportanthwcaps adapted from elf/dl-hwcaps.c, part of the GNU C Library: Copyright C...

Linux/x86 - XOR encoded execve(/bin/sh) setuid(0) setgid(0) Shellcode (66 bytes)

;Title: Linux/x86 - 66 byte - execve/bin/sh - setuid0 - setgid0 - XOR encrypted ;Author: nullparasite ;Contact: email protected ;Category: Shellcode ;Architecture: Linux x86 ;Description: This shellcode, first set uid and gid to zero then call shell using execve. Also, /bin/sh defined as a XOR...

Linux/x86 - XOR encoded execve(/bin/sh) setuid(0) setgid(0) Shellcode (66 bytes)

Linux/x86 - XOR encoded execve/bin/sh setuid0 setgid0 Shellcode 66 bytes. Shellcode exploit for Linx86 platform ;Title: Linux/x86 - 66 byte - execve/bin/sh - setuid0 - setgid0 - XOR encrypted ;Author: nullparasite ;Contact: [email protected] ;Category: Shellcode ;Architecture: Linux x86...

AUFS (Ubuntu 15.10) Privilege Escalation

Source: http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ Introduction Problem description: Aufs is a union filesystem to mix content of different underlying filesystems, e.g. read-only medium with r/w RAM-fs. That is also allowed in user namespaces when module was...

Debian DSA-3823-1 : eject - security update

Ilja Van Sprundel discovered that the dmcrypt-get-device helper used to check if a given device is an encrypted device handled by devmapper, and used in eject, does not check return values from setuid and setgid when dropping privileges. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The...

Debian DLA-876-1 : eject security update

Ilja Van Sprundel discovered that eject a tool to eject CD/DVD drives did not properly handle errors returned from setuid/setgid. For Debian 7 'Wheezy', this issue has been fixed in eject version 2.1.5+deb1+cvs20081104-13+deb7u1. We recommend that you upgrade your eject packages. NOTE: Tenable...

Ubuntu 15.10 AUFS - allow_userns Fuse/Xattr User Namespaces Privilege Escalation Vulnerability

Exploit for linux platform in category local exploits Source: http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ Introduction Problem description: Aufs is a union filesystem to mix content of different underlying filesystems, e.g. read-only medium with r/w RAM-fs. That ...

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...

[SECURITY] [DSA 3823-1] eject security update

------------------------------------------------------------------------- Debian Security Advisory DSA-3823-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso March 28, 2017 https://www.debian.org/security/faq -...

[SECURITY] [DLA 876-1] eject security update

Package : eject Version : 2.1.5+deb1+cvs20081104-13+deb7u1 CVE ID : CVE-2017-6964 Debian Bug : 858872 Ilja Van Sprundel discovered that eject a tool to eject CD/DVD drives did not properly handle errors returned from setuid/setgid. For Debian 7 "Wheezy", this issue has been fixed in eject version...

CVE-2017-6964

dmcrypt-get-device, as shipped in the eject package of Debian and Ubuntu, does not check the return value of the 1 setuid or 2 setgid function, which might cause dmcrypt-get-device to execute code, which was intended to run as an unprivileged user, as root. This affects eject through...

Design/Logic Flaw

dmcrypt-get-device, as shipped in the eject package of Debian and Ubuntu, does not check the return value of the 1 setuid or 2 setgid function, which might cause dmcrypt-get-device to execute code, which was intended to run as an unprivileged user, as root. This affects eject through...