SB2019100138 - Improper input validation in Linux kernel
Published: October 1, 2019
Security Bulletin ID
SB2019100138
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper input validation (CVE-ID: CVE-2019-17075)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
An issue was discovered in write_tpt_entry in drivers/infiniband/hw/cxgb4/mem.c in the Linux kernel through 5.3.2. The cxgb4 driver is directly calling dma_map_single (a DMA function) from a stack variable. This could allow an attacker to trigger a Denial of Service, exploitable if this driver is used on an architecture for which this stack/DMA interaction has security relevance.
Remediation
Install update from vendor's website.
References
- https://lore.kernel.org/lkml/20191001165611.GA3542072@kroah.com
- https://seclists.org/bugtraq/2019/Nov/11
- http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- https://usn.ubuntu.com/4208-1/
- https://usn.ubuntu.com/4210-1/
- https://usn.ubuntu.com/4211-2/
- https://usn.ubuntu.com/4211-1/
- https://usn.ubuntu.com/4226-1/
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://www.oracle.com/security-alerts/cpuApr2021.html