// For flags

CVE-2019-10638

Kernel: net: weak IP ID generation leads to remote device tracking

Severity Score

6.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

En el kernel de Linux anterior a versión 5.1.7, un atacante puede rastrear un dispositivo utilizando los valores ID de IP que el kernel produce para los protocolos sin conexión (por ejemplo, UDP e ICMP). Cuando dicho tráfico se envía a múltiples direcciones IP de destino, es posible obtener colisiones de hash (de índices en la matriz counter) y, de este modo, obtener la clave de hashing (mediante enumeración). Puede ser conducido un ataque mediante el alojamiento de una página web especialmente diseñada que utiliza WebRTC o gQUIC para forzar el tráfico UDP a las direcciones IP controladas por el atacante.

A flaw was found in the way the Linux kernel derived the IP ID field from a partial kernel space address returned by a net_hash_mix() function. A remote user could observe a weak IP ID generation in this field to track Linux devices.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-03-29 CVE Reserved
  • 2019-07-05 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-326: Inadequate Encryption Strength
CAPEC
References (30)
URL Tag Source
http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html X_refsource_misc
http://www.securityfocus.com/bid/109092 Third Party Advisory
https://arxiv.org/pdf/1906.10478.pdf Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html Mailing List
https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html Mailing List
https://seclists.org/bugtraq/2019/Aug/13 Mailing List
https://seclists.org/bugtraq/2019/Aug/18 Mailing List
https://seclists.org/bugtraq/2019/Nov/11 Mailing List
https://security.netapp.com/advisory/ntap-20190806-0001 X_refsource_confirm
https://www.oracle.com/security-alerts/cpuApr2021.html X_refsource_misc
URL Date SRC
URL Date SRC
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92 2021-06-14
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=df453700e8d81b1bdafdf684365ee2b9431fb702 2021-06-14
https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92 2021-06-14
https://github.com/torvalds/linux/commit/55f0fc7a02de8f12757f4937143d8d5091b2e40b 2021-06-14
https://github.com/torvalds/linux/commit/df453700e8d81b1bdafdf684365ee2b9431fb702 2021-06-14
URL Date SRC
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html 2021-06-14
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html 2021-06-14
https://access.redhat.com/errata/RHSA-2019:3309 2021-06-14
https://access.redhat.com/errata/RHSA-2019:3517 2021-06-14
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8 2021-06-14
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.7 2021-06-14
https://usn.ubuntu.com/4114-1 2021-06-14
https://usn.ubuntu.com/4115-1 2021-06-14
https://usn.ubuntu.com/4116-1 2021-06-14
https://usn.ubuntu.com/4117-1 2021-06-14
https://usn.ubuntu.com/4118-1 2021-06-14
https://www.debian.org/security/2019/dsa-4495 2021-06-14
https://www.debian.org/security/2019/dsa-4497 2021-06-14
https://access.redhat.com/security/cve/CVE-2019-10638 2020-03-31
https://bugzilla.redhat.com/show_bug.cgi?id=1729931 2020-03-31
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.1.7
Search vendor "Linux" for product "Linux Kernel" and version " < 5.1.7"
-
Affected