CVE-2017-17862 Information

Description

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code even though it would still be processed by JIT compilers. This behavior also considered an improper branch-pruning logic issue could possibly be used by local users for denial of service.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467 http://www.securityfocus.com/bid/102325 http://www.securitytracker.com/id/1040057 https://anonscm.debian.org/cgit/kernel/linux.git/tree/debian/patches/bugfix/all/bpf-fix-branch-pruning-logic.patch?h=stretch-security https://github.com/torvalds/linux/commit/c131187db2d3fa2f8bf32fdf4e9a4ef805168467 https://usn.ubuntu.com/3619-1/ https://usn.ubuntu.com/3619-2/ https://usn.ubuntu.com/usn/usn-3523-2/ https://www.debian.org/security/2017/dsa-4073 https://www.spinics.net/lists/stable/msg206984.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5