SB2019061412 - Use-after-free in Linux kernel net phy driver
Published: June 14, 2019
Security Bulletin ID
SB2019061412
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2019-12819)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the __mdiobus_register() function in drivers/net/phy/mdio_bus.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
- http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html
- http://www.securityfocus.com/bid/108768
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6ff7b060535e87c2ae14dd8548512abfdda528fb
- https://github.com/torvalds/linux/commit/6ff7b060535e87c2ae14dd8548512abfdda528fb
- https://security.netapp.com/advisory/ntap-20190710-0002/
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/