5.3
Medium
CVE-2019-11479 Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes
Description
Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Kernel 5.1 | 5.1 → < 5.1.11 | 5.1.11 |
| Linux Kernel 4.19 | 4.19 → < 4.19.52 | 4.19.52 |
| Linux Kernel 4.14 | 4.14 → < 4.14.127 | 4.14.127 |
| Linux Kernel 4.9 | 4.9 → < 4.9.182 | 4.9.182 |
| Linux Kernel 4.4 | 4.4 → < 4.4.182 | 4.4.182 |
References
- 108818 www.securityfocus.com
- VU#905115 www.kb.cert.org
- RHSA-2019:1594 access.redhat.com
- RHSA-2019:1602 access.redhat.com
- [oss-security] 20190628 Re: linux-distros membership application - Microsoft www.openwall.com
- USN-4041-2 usn.ubuntu.com
- [oss-security] 20190706 Re: linux-distros membership application - Microsoft www.openwall.com
- [oss-security] 20190706 Re: linux-distros membership application - Microsoft www.openwall.com
- RHSA-2019:1699 access.redhat.com
- USN-4041-1 usn.ubuntu.com
- www.oracle.com www.oracle.com
- www.oracle.com www.oracle.com
- github.com github.com
- wiki.ubuntu.com wiki.ubuntu.com
- access.redhat.com access.redhat.com
- kb.pulsesecure.net kb.pulsesecure.net
- www.synology.com www.synology.com
- security.netapp.com security.netapp.com
- kc.mcafee.com kc.mcafee.com
- cert-portal.siemens.com cert-portal.siemens.com
- www.us-cert.gov www.us-cert.gov
- www.arubanetworks.com www.arubanetworks.com
- git.kernel.org git.kernel.org
- git.kernel.org git.kernel.org
- support.f5.com support.f5.com
- psirt.global.sonicwall.com psirt.global.sonicwall.com
- support.f5.com support.f5.com
- www.us-cert.gov www.us-cert.gov
Timeline
- Published
- Last modified
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