CVE-2019-11479
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - security@ubuntu.com
- Published
- 2019-06-19
- Last modified
- 2024-09-16
- Weaknesses
- CWE-405, CWE-770
Affected products
- Ubuntu Linux (Canonical)
- Big-ip Access Policy Manager (F5)
- Big-ip Advanced Firewall Manager (F5)
- Big-ip Analytics (F5)
- Big-ip Application Acceleration Manager (F5)
- Big-ip Application Security Manager (F5)
- Big-ip Domain Name System (F5)
- Big-ip Edge Gateway (F5)
- Big-ip Fraud Protection Service (F5)
- Big-ip Global Traffic Manager (F5)
- Big-ip Link Controller (F5)
- Big-ip Local Traffic Manager (F5)
- Big-ip Policy Enforcement Manager (F5)
- Big-ip Webaccelerator (F5)
- Big-iq Centralized Management (F5)
- Enterprise Manager (F5)
- Iworkflow (F5)
- Traffix Signaling Delivery Controller (F5)
- Linux Kernel (Linux)
- Enterprise Linux (Redhat)
- Virtualization Host (Redhat)
References
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
- http://www.openwall.com/lists/oss-security/2019/06/28/2
- http://www.openwall.com/lists/oss-security/2019/07/06/3
- http://www.openwall.com/lists/oss-security/2019/07/06/4
- http://www.securityfocus.com/bid/108818
- https://access.redhat.com/errata/RHSA-2019:1594
- https://access.redhat.com/errata/RHSA-2019:1602
- https://access.redhat.com/errata/RHSA-2019:1699
- https://access.redhat.com/security/vulnerabilities/tcpsack
- https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
- https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
- https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
- https://kc.mcafee.com/corporate/index?page=content&id=SB10287
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008
- https://security.netapp.com/advisory/ntap-20190625-0001/
- https://support.f5.com/csp/article/K35421172
- https://support.f5.com/csp/article/K35421172?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/4041-1/
- https://usn.ubuntu.com/4041-2/
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
- https://www.kb.cert.org/vuls/id/905115
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.synology.com/security/advisory/Synology_SA_19_28
- https://www.us-cert.gov/ics/advisories/icsa-19-253-03
- https://www.us-cert.gov/ics/advisories/icsma-20-170-06
