CVE-2019-18282

 

Published at: - 16-01-2020 05:15

Last modified: - 26-10-2022 01:44

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• 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/
• [debian-lts-announce] 20200302 [SECURITY] [DLA 2114-1] linux-4.9 security update-Mailing List, Third Party Advisory
• https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o

 

Keywords

NVD

 

CVE-2019-18282

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures