CVE-2019-11479

 

Published at: - 19-06-2019 02:15

Last modified: - 26-10-2022 02:02

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
• https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
• https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
• https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
• https://access.redhat.com/security/vulnerabilities/tcpsack
• https://support.f5.com/csp/article/K35421172
• 108818-Third Party Advisory, VDB Entry
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
• VU#905115-Third Party Advisory, US Government Resource
• https://www.synology.com/security/advisory/Synology_SA_19_28
• https://security.netapp.com/advisory/ntap-20190625-0001/
• RHSA-2019:1594-Third Party Advisory
• RHSA-2019:1602-Third Party Advisory
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008
• https://kc.mcafee.com/corporate/index?page=content&id=SB10287
• [oss-security] 20190628 Re: linux-distros membership application - Microsoft-Mailing List, Third Party Advisory
• USN-4041-2-Third Party Advisory
• [oss-security] 20190706 Re: linux-distros membership application - Microsoft-Mailing List, Third Party Advisory
• [oss-security] 20190706 Re: linux-distros membership application - Microsoft-Mailing List, Third Party Advisory
• RHSA-2019:1699-Third Party Advisory
• USN-4041-1-Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
• https://www.us-cert.gov/ics/advisories/icsa-19-253-03
• https://support.f5.com/csp/article/K35421172?utm_source=f5support&utm_medium=RSS
• https://www.oracle.com/security-alerts/cpujan2020.html
• https://www.us-cert.gov/ics/advisories/icsma-20-170-06
• http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
• https://www.oracle.com/security-alerts/cpuoct2020.html

 

Keywords

NVD

 

CVE-2019-11479

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures