SB2019090439 - Use-after-free in Linux kernel
Published: September 4, 2019 Updated: January 9, 2020
Security Bulletin ID
SB2019090439
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2019-15917)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when hci_uart_register_dev() fails in hci_uart_set_proto() in drivers/bluetooth/hci_ldisc.c. A remote attacker with physical proximity to the system can send specially crafted Bluetoth data and execute arbitrary code.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.5
- https://github.com/torvalds/linux/commit/56897b217a1d0a91c9920cb418d6b3fe922f590a
- https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html