- Vulnerability/
- USN-4041-2
USN-4041-2: Linux kernel (HWE) update
First published: Sat Jun 29 2019(Updated: )
USN-4041-1 provided updates for the Linux kernel in Ubuntu. This update provides the corresponding updates for the Linux kernel for Ubuntu 16.04 ESM. USN-4017-2 fixed vulnerabilities in the Linux kernel. Unfortunately, the update introduced a regression that interfered with networking applications that setup very low SO_SNDBUF values. This update fixes the problem. We apologize for the inconvenience. Jonathan Looney discovered that the Linux kernel could be coerced into segmenting responses into multiple TCP segments. A remote attacker could construct an ongoing sequence of requests to cause a denial of service. (CVE-2019-11479)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/linux-image-powerpc-smp-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-generic-lpae-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-generic-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-powerpc64-smp | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-generic-lpae | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-1048-aws | <4.4.0-1048.52 | 4.4.0-1048.52 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-powerpc64-emb-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-generic | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-lowlatency-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-powerpc-smp | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-powerpc-e500mc | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-azure | <4.15.0.1049.36 | 4.15.0.1049.36 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-lowlatency | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-aws | <4.4.0.1048.49 | 4.4.0.1048.49 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-powerpc64-smp-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.4.0-154-powerpc64-emb | <4.4.0-154.181~14.04.1 | 4.4.0-154.181~14.04.1 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-powerpc-e500mc-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-virtual-lts-xenial | <4.4.0.154.135 | 4.4.0.154.135 |
| =14.04 | ||
| All of | ||
| ubuntu/linux-image-4.15.0-1049-azure | <4.15.0-1049.54~14.04.1 | 4.15.0-1049.54~14.04.1 |
| =14.04 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://ubuntu.com/security/CVE-2019-11479
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
- https://ubuntu.com/security/notices/USN-4041-1
- https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-154.181~14.04.1
- https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1048.52
- https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1049.54~14.04.1
- https://ubuntu.com/security/notices/USN-4041-2 (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this update?
The vulnerability ID for this update is CVE-2019-11479.
What is the impact of CVE-2019-11479?
CVE-2019-11479 can lead to denial of service (DoS) attacks by consuming excessive resources on a target system.
How can I fix the CVE-2019-11479 vulnerability?
To fix the CVE-2019-11479 vulnerability, you should update the Linux kernel to version 4.4.0.154.135 or later.
Where can I find more information about CVE-2019-11479?
More information about CVE-2019-11479 can be found on the Ubuntu Security Notices website.
What is the link to the Ubuntu Security Notice for this update?
The Ubuntu Security Notice for this update can be found at: [Link to USN-4041-2]
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/title
- agent/type
- collector/usn
- source/Ubuntu
- anchor-related/USN-4041-1
- agent/software-canonical-lookup
- package-manager/ubuntu
- vendor/ubuntu
- canonical/ubuntu ubuntu
- version/ubuntu ubuntu/14.04