SB2019082027 - Use-after-free in Linux kernel
Published: August 20, 2019 Updated: September 3, 2019
Security Bulletin ID
SB2019082027
Severity
Medium
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 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2019-15215)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the CPiA2 video4linux device driver in the "drivers/media/usb/cpia2/cpia2_usb.c" driver. A local authenticated user with physical access to the system can use a malicious USB device and cause a denial of service (system crash) or possibly execute arbitrary code.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install update from vendor's website.
References
- http://www.openwall.com/lists/oss-security/2019/08/20/2
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eff73de2b1600ad8230692f00bc0ab49b166512a
- https://syzkaller.appspot.com/bug?id=b68d3c254cf294f8a802582094fa3251d6de5247
- https://usn.ubuntu.com/4115-1/
- https://usn.ubuntu.com/4118-1/