CVE-2017-17807 Information

Description

The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task’s \default request-key keyring\ via the request_key() system call allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring related to construct_get_dest_keyring() in security/keys/request_key.c.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4dca6ea1d9432052afb06baf2e3ae78188a4410b http://www.securityfocus.com/bid/102301 https://github.com/torvalds/linux/commit/4dca6ea1d9432052afb06baf2e3ae78188a4410b https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html https://usn.ubuntu.com/3617-1/ https://usn.ubuntu.com/3617-2/ https://usn.ubuntu.com/3617-3/ https://usn.ubuntu.com/3619-1/ https://usn.ubuntu.com/3619-2/ https://usn.ubuntu.com/3620-1/ https://usn.ubuntu.com/3620-2/ https://usn.ubuntu.com/3632-1/ https://www.debian.org/security/2017/dsa-4073 https://www.debian.org/security/2018/dsa-4082 https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

3.3