SB2019120350 - Ubuntu update for linux, linux-aws, linux-kvm and more

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Main Vulnerability Database SB2019120350

SB2019120350 - Ubuntu update for linux, linux-aws, linux-kvm and more

Published: December 3, 2019 Updated: October 31, 2026

Security Bulletin ID SB2019120350
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2018-20784)

CWE-ID: CWE-400 - Resource exhaustion

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 an error in resource management within the update_blocked_averages function in kernel/sched/fair.c when processing leaf cfs_rq's. A local user can cause resource exhaustion and perform a denial of service (DoS) attack.


2) Improper input validation (CVE-ID: CVE-2019-17075)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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.


3) Buffer overflow (CVE-ID: CVE-2019-17133)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 7.7 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the cfg80211_mgd_wext_giwessid function in net/wireless/wext-sme.c in Linux kernel, because the affected component does not reject a long SSID IE. A remote attacker on the local wireless network can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References