Buffer overflow in Linux kernel - CVE-2017-7184

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Main Vulnerability Database Vulnerabilities #VU6184

Buffer overflow in Linux kernel - CVE-2017-7184

Published: March 30, 2017 / Updated: October 11, 2021


Vulnerability identifier: #VU6184
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-7184
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to execute arbitrary code on the target system with escalated privileges.

The vulnerability exists due to boundary error in xfrm_replay_verify_len() function in net/xfrm/xfrm_user.c in Linux kernel when validating data after an XFRM_MSG_NEWAE update. A local use can trigger heap-based buffer overflow by leveraging the CAP_NET_ADMIN capability and execute arbitrary code on the target system with root privileges.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

This vulnerability was demonstrated during the Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.


Affected software

Linux kernel
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux Server (for IBM Power LE) - 4 Year Extended Update Support
Red Hat Enterprise Linux Server - 4 Year Extended Update Support
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
SUSE Linux
Ubuntu

MRG Realtime
kernel (Red Hat package)
kernel-rt (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Virtualization Host
MiR100
MiR200
MiR250
MiR500
MiR1000
MiR Fleet

How to mitigate CVE-2017-7184

Install update from GIT repository.

kernel (Red Hat package) - addressed in versions 3.10.0-514.71.1.el7, 3.10.0-693.5.2.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.5.2.rt56.592.el6rt, 3.10.0-693.5.2.rt56.626.el7
MiR100 - update to 2.10.2.1
MiR200 - update to 2.10.2.1
MiR250 - update to 2.10.2.1
MiR500 - update to 2.10.2.1
MiR1000 - update to 2.10.2.1
MiR Fleet - update to 2.10.2.1

External References

Related Security Bulletins