SB2020102053 - Debian update for linux
Published: October 20, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2020-12351)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input within the BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and execute arbitrary code on the system.
2) Improper access control (CVE-ID: CVE-2020-12352)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to improper access restrictions in BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and gain access to sensitive information.
3) Buffer overflow (CVE-ID: CVE-2020-25211)
The vulnerability allows a local user to crash the system.
The vulnerability exists due to a boundary error within the ctnetlink_parse_tuple_filter() function in net/netfilter/nf_conntrack_netlink.c. A local user can inject conntrack netlink configuration, trigger buffer overflow and crash the kernel or force usage of incorrect protocol numbers.
4) Out-of-bounds read (CVE-ID: CVE-2020-25643)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the HDLC_PPP module of the Linux kernel in the ppp_cp_parse_cr() function. A remote authenticated user can trigger out-of-bounds read error and read contents of memory on the system.
5) Cleartext transmission of sensitive information (CVE-ID: CVE-2020-25645)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to traffic passed between two Geneve endpoints with configured IPsec can be unencrypted for the specific UDP port. A remote attacker with ability to intercept network traffic can gain access to sensitive data.
Remediation
Install update from vendor's website.