Privilege escalation in Linux kernel



Published: 2017-10-04
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-14991
CWE-ID CWE-401
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Memory leak

EUVDB-ID: #VU8693

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14991

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak in sg_ioctl() function in drivers/scsi/sg.c. A local user can obtain sensitive information from uninitialized kernel heap-memory locations via an SG_GET_REQUEST_TABLE ioctl call for /dev/sg0.

Mitigation

Update to version 4.13.4.

Vulnerable software versions

Linux kernel: 4.13 - 4.13.3

External links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3e0097499839e0fe3af380410e...
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.4 
http://github.com/torvalds/linux/commit/3e0097499839e0fe3af380410eababe5a47c4cf9


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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