Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2017-5123 |
CWE-ID | CWE-391 |
Exploitation vector | Local |
Public exploit | Public exploit code for vulnerability #1 is available. |
Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU8828
Risk: Low
CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2017-5123
CWE-ID:
CWE-391 - Unchecked Error Condition
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The waitid implementation in kernel/exit.c in the Linux kernel through
4.13.4 does not check that the incoming argument points to the
userspace. This can allow local users to write directly to kernel
memory, which could lead to privilege escalation.
Install update from vendor's repository.
Linux kernel: 4.13 - 4.13.4
External linkshttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.7
http://access.redhat.com/security/cve/cve-2017-5123
http://seclists.org/oss-sec/2017/q4/78
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, proof of concept for this vulnerability is available.