#VU7131 Memory corruption in Linux kernel
Vulnerability identifier: #VU7131
Vulnerability risk: Medium
CVSSv3.1: 8.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-119
Exploitation vector: Local
Exploit availability: Yes
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to memory management errors in implementation of various functions under multiple operating systems. A local or remote attacker can trigger the affected application to process specially crafted data, trigger memory corruption and execute arbitrary code on the target system. The vulnerability is dubbed by Qualys researchers as “Stack Clash”.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Mitigation
Update Linux kernel to version 4.11.6.
Vulnerable software versions
Linux kernel: 4.11.1 - 4.11.5, 2.6.0 - 2.6.36 rc3, 4.10.0 - 4.10.15, 3.8, 3.9, 3.5.1 - 3.5.5, 3.4 - 3.4.32, 3.3 - 3.3.8, 3.2 - 3.2.81-1, 3.1 - 3.1.10, 3.0 - 3.0.68, 3.19, 3.18, 4.3.1 - 4.3.6, 3.14.72
External links
http://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt?_ga=2.101223617.152741184.1497954934-1...
http://blog.qualys.com/securitylabs/2017/06/19/the-stack-clash
http://cansecwest.com/core05/memory_vulns_delalleau.pdf
http://access.redhat.com/security/cve/CVE-2017-1000364
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.
