SB2020092418 - Incorrect default permissions in Linux kernel
Published: September 24, 2020
Security Bulletin ID
SB2020092418
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Incorrect default permissions (CVE-ID: CVE-2020-26088)
The vulnerability allows a local user to manipulate data.
A missing CAP_NET_RAW check in NFC socket creation in net/nfc/rawsock.c in the Linux kernel before 5.8.2 could be used by local attackers to create raw sockets, bypassing security mechanisms, aka CID-26896f01467a.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/26896f01467a28651f7a536143fe5ac8449d4041
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- https://usn.ubuntu.com/4578-1/
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html