CVE-2019-18282

medium
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Description

The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code.

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2

https://security.netapp.com/advisory/ntap-20200204-0002/

https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html

https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o

Details

Source: MITRE

Published: 2020-01-16

Updated: 2021-07-21

Type: CWE-200

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Impact Score: 1.4

Exploitability Score: 3.9

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from 4.3 to 5.3.10 (inclusive)

Tenable Plugins

View all (13 total)

IDNameProductFamilySeverity
154699F5 Networks BIG-IP : Linux kernel vulnerability (K32380005)NessusF5 Networks Local Security Checks
medium
145850CentOS 8 : kernel (CESA-2020:1769)NessusCentOS Local Security Checks
critical
144731EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2021-1039)NessusHuawei Local Security Checks
high
144549CentOS 7 : kernel (CESA-2020:5437)NessusCentOS Local Security Checks
high
144404RHEL 7 : kernel (RHSA-2020:5437)NessusRed Hat Local Security Checks
high
144402RHEL 7 : kernel-rt (RHSA-2020:5441)NessusRed Hat Local Security Checks
high
144333Oracle Linux 7 : kernel (ELSA-2020-5437)NessusOracle Linux Local Security Checks
high
144295Scientific Linux Security Update : kernel on SL7.x x86_64 (2020:5437)NessusScientific Linux Local Security Checks
high
139995EulerOS Virtualization for ARM 64 3.0.6.0 : kernel (EulerOS-SA-2020-1892)NessusHuawei Local Security Checks
high
139137EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-1807)NessusHuawei Local Security Checks
high
138766NewStart CGSL MAIN 6.01 : kernel Multiple Vulnerabilities (NS-SA-2020-0030)NessusNewStart CGSL Local Security Checks
critical
137291Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5715)NessusOracle Linux Local Security Checks
critical
134240Debian DLA-2114-1 : linux-4.9 security updateNessusDebian Local Security Checks
critical