Resource management error in Linux kernel - CVE-2017-6074

Vulnerability identifier: #VU5869

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear

CVE-ID: CVE-2017-6074

CWE-ID: CWE-399

Exploitation vector: Local access

Exploit availability: Public exploit is available

Affected software:
Linux kernel
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux Server for ARM
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
SUSE Linux
Fedora

MRG Realtime
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel
Red Hat Virtualization

The vulnerability allows a local user to cause kernel panic.

The vulnerability exists due to invalid free in the dccp_rcv_state_process() function in net/dccp/input.c file in the Linux kernel through 4.9.11 when processing DCCP_PKT_REQUEST packet data structures in the LISTEN state. A local user can use userspace application to make an IPV6_RECVPKTINFO setsockopt system call and cause kernel panic.

Successful exploitation of this vulnerability may result in denial of service condition.

Install patch from GIT repository.

• https://github.com/torvalds/linux/commit/5edabca9d4cff7f1f2b68f0bac55ef99d9798ba4