#VU93742 Improper privilege management in Linux kernel - CVE-2017-5551

Vulnerability identifier: #VU93742

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-5551

CWE-ID: CWE-269

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to read and manipulate data.

The vulnerability exists due to improperly imposed permissions within the simple_set_acl() function in fs/posix_acl.c. A local user can read and manipulate data.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=497de07d89c1410d76a15bec2bb41f24a2a89f31
https://www.debian.org/security/2017/dsa-3791
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6
https://www.openwall.com/lists/oss-security/2017/01/21/3
https://www.securityfocus.com/bid/95717
https://www.securitytracker.com/id/1038053
https://bugzilla.redhat.com/show_bug.cgi?id=1416126
https://github.com/torvalds/linux/commit/497de07d89c1410d76a15bec2bb41f24a2a89f31

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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.