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...

Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3234-2)

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3234-2 advisory. USN-3234-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enableme...

Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3234-1)

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3234-1 advisory. Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel did not properly validate meta block groups. An attacker with physical access...

Ubuntu: Security Advisory (USN-3234-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2017 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

USN-3234-1: Linux kernel vulnerabilities

Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel did not properly validate meta block groups. An attacker with physical access could use this to specially craft an ext4 image that causes a denial of service system crash. CVE-2016-10208 It was discovered that the Linux...

Amazon Linux AMI : kernel (ALAS-2017-805)

A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol DCCP implementation freed SKB socket buffer resources for a DCCPPKTREQUEST packet when the IPV6RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the...

CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

Design/Logic Flaw

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

DEBIAN-CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

CVE-2017-5551

CVE-2017-5551 affects the Linux kernel; the simple_set_acl function in fs/posix_acl.c does not clear the setgid bit during a setxattr call on tmpfs, enabling a local user to gain group privileges if a setgid program exists with restricted execute permissions. This is tied to an incomplete fix of ...

CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

UBUNTU-CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

CVE-2017-5551: Undefined Security Weakness

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...

Man-db 2.6.7.1 Privilege Escalation

/ EDB Note: man:man - man:root http://www.halfdog.net/Security/2015/SetgidDirectoryPrivilegeEscalation/ man:root - root:root http://www.halfdog.net/Security/2015/MandbSymlinkLocalRootPrivilegeEscalation/ CreateSetgidBinary.c...

Man-db 2.6.7.1 - Privilege Escalation Exploit

Exploit for linux platform in category local exploits / EDB Note: man:man - man:root http://www.halfdog.net/Security/2015/SetgidDirectoryPrivilegeEscalation/ man:root - root:root http://www.halfdog.net/Security/2015/MandbSymlinkLocalRootPrivilegeEscalation/ CreateSetgidBinary.c...

CVE-2017-5551

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...

Systemd 228 (SUSE 12 SP2 / Ubuntu Touch 15.04) - Local Privilege Escalation

/ source: http://www.openwall.com/lists/oss-security/2017/01/24/4 This is a heads up for a trivial systemd local root exploit, that was silently fixed in the upstream git as: commit 06eeacb6fe029804f296b065b3ce91e796e1cd0e Author: .... Date: Fri Jan 29 23:36:08 2016 +0200 basic: fix touch creatin...