CVE-2017-16939 Information

Description

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2 http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html http://seclists.org/fulldisclosure/2017/Nov/40 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11 http://www.securityfocus.com/bid/101954 https://access.redhat.com/errata/RHSA-2018:1318 https://access.redhat.com/errata/RHSA-2018:1355 https://access.redhat.com/errata/RHSA-2019:1170 https://access.redhat.com/errata/RHSA-2019:1190 https://blogs.securiteam.com/index.php/archives/3535 https://bugzilla.suse.com/show_bug.cgi?id=1069702 https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2 https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html https://www.debian.org/security/2018/dsa-4082

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8