CVE-2019-10638 Information

Description

In the Linux kernel before 5.1.7 a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g. UDP and ICMP). When such traffic is sent to multiple destination IP addresses it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html http://www.securityfocus.com/bid/109092 https://access.redhat.com/errata/RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3517 https://arxiv.org/pdf/1906.10478.pdf https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.7 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=df453700e8d81b1bdafdf684365ee2b9431fb702 https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92 https://github.com/torvalds/linux/commit/55f0fc7a02de8f12757f4937143d8d5091b2e40b https://github.com/torvalds/linux/commit/df453700e8d81b1bdafdf684365ee2b9431fb702 https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html https://seclists.org/bugtraq/2019/Aug/13 https://seclists.org/bugtraq/2019/Aug/18 https://seclists.org/bugtraq/2019/Nov/11 https://security.netapp.com/advisory/ntap-20190806-0001/ https://usn.ubuntu.com/4114-1/ https://usn.ubuntu.com/4115-1/ https://usn.ubuntu.com/4116-1/ https://usn.ubuntu.com/4117-1/ https://usn.ubuntu.com/4118-1/ https://www.debian.org/security/2019/dsa-4495 https://www.debian.org/security/2019/dsa-4497

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5