Denial of service in Linux Kernel



| Updated: 2018-05-28
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2017-17052
CVE-2018-10675
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free error

EUVDB-ID: #VU12108

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17052

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the mm_init function in kernel/fork.c due to improper clarification of the ->exe_file member of a new process's mm_struct. A local attacker can trigger use after free error and cause the service to crash.

Mitigation

Update to version 4.12.10.

Vulnerable software versions

Linux kernel: 4.12 - 4.12.9

CPE2.3 External links

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2b7e8665b4ff51c034c55d...


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.

2) Use-after-free error

EUVDB-ID: #VU13023

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10675

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the do_get_mempolicy function in mm/mempolicy.c due to use-after-free error. A local attacker can use specially crafted system calls, trigger memory corruption and cause the service to crash.

Mitigation

Update to version 4.12.9.

Vulnerable software versions

Linux kernel: 4.10 - 4.12.8

CPE2.3 External links

https://github.com/torvalds/linux/commit/73223e4e2e3867ebf033a5a8eb2e5df0158ccc99


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.



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