CVE-2017-5551

The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097.

CVSS v3.0 4.4 MEDIUM
CVSS v2.0 3.6 LOW

4.4^/10

CVSS v3.0 : MEDIUM

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Exploitability : 1.8 / Impact : 2.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

3.6^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:N

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/torvalds/linux/commit/497de07d89c1410d76a15bec2bb41f24a2a89f31	Issue Tracking Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1416126	Issue Tracking Patch
http://www.openwall.com/lists/oss-security/2017/01/21/3	Mailing List Patch Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6	Release Notes Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=497de07d89c1410d76a15bec2bb41f24a2a89f31	Issue Tracking Patch Third Party Advisory
http://www.securityfocus.com/bid/95717	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038053
http://www.debian.org/security/2017/dsa-3791

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Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Information

Published : 2017-02-05 22:59

Updated : 2019-10-02 17:03

NVD link : CVE-2017-5551

Mitre link : CVE-2017-5551

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

linux

linux_kernel

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