Vulnerability Details : 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.
Vulnerability category: Denial of service
Products affected by CVE-2019-11479
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Security ManagerVersions from including (>=) 12.1.0 and before (<) 12.1.5.1cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Security ManagerVersions from including (>=) 11.5.2 and before (<) 11.6.5.1cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Security ManagerVersions from including (>=) 13.1.0 and before (<) 13.1.3.2cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Security ManagerVersions from including (>=) 14.1.2 and before (<) 14.1.2.1cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Security ManagerVersions from including (>=) 15.0.0 and before (<) 15.0.1.1cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Security ManagerVersions from including (>=) 14.0.0 and before (<) 14.0.1.1cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:enterprise_manager:3.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Acceleration ManagerVersions from including (>=) 14.1.2 and before (<) 14.1.2.1cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Acceleration ManagerVersions from including (>=) 13.1.0 and before (<) 13.1.3.2cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Acceleration ManagerVersions from including (>=) 12.1.0 and before (<) 12.1.5.1cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Acceleration ManagerVersions from including (>=) 11.5.2 and before (<) 11.6.5.1cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Acceleration ManagerVersions from including (>=) 15.0.0 and before (<) 15.0.1.1cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
- F5 » Big-ip Application Acceleration ManagerVersions from including (>=) 14.0.0 and before (<) 14.0.1.1cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
- F5 » Big-iq Centralized ManagementVersions from including (>=) 6.0.0 and up to, including, (<=) 6.1.0cpe:2.3:a:f5:big-iq_centralized_management:*:*:*:*:*:*:*:*
- F5 » Big-iq Centralized ManagementVersions from including (>=) 5.1.0 and up to, including, (<=) 5.4.0cpe:2.3:a:f5:big-iq_centralized_management:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
- F5 » Traffix Signaling Delivery ControllerVersions from including (>=) 5.0.0 and up to, including, (<=) 5.1.0cpe:2.3:a:f5:traffix_signaling_delivery_controller:*:*:*:*:*:*:*:*
- cpe:2.3:a:f5:iworkflow:2.3.0:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-11479
96.64%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-11479
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
Canonical Ltd. | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2019-11479
-
The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."Assigned by: security@ubuntu.com (Secondary)
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-11479
-
https://www.oracle.com/security-alerts/cpujan2020.html
Oracle Critical Patch Update Advisory - January 2020Third Party Advisory
-
https://www.oracle.com/security-alerts/cpuoct2020.html
Oracle Critical Patch Update Advisory - October 2020
-
https://www.synology.com/security/advisory/Synology_SA_19_28
Synology Inc.Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:1699
RHSA-2019:1699 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://support.f5.com/csp/article/K35421172
Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20190625-0001/
Linux Kernel TCP SACK Panic Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008
SonicWall Security AdvisoryThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:1594
RHSA-2019:1594 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://support.f5.com/csp/article/K35421172?utm_source=f5support&utm_medium=RSS
Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2019/07/06/4
oss-security - Re: linux-distros membership application - MicrosoftMailing List;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:1602
RHSA-2019:1602 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://usn.ubuntu.com/4041-2/
USN-4041-2: Linux kernel (HWE) update | Ubuntu security noticesThird Party Advisory
-
http://www.securityfocus.com/bid/108818
Linux Kernel CVE-2019-11479 Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
SecurityTeam/KnowledgeBase/SACKPanic - Ubuntu WikiMitigation;Third Party Advisory
-
https://www.us-cert.gov/ics/advisories/icsa-19-253-03
Siemens Industrial Products (Update D) | CISAThird Party Advisory;US Government Resource
-
https://usn.ubuntu.com/4041-1/
USN-4041-1: Linux kernel update | Ubuntu security noticesThird Party Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
kernel/git/davem/net.git - David Miller's networking treeMailing List;Patch;Vendor Advisory
-
https://kc.mcafee.com/corporate/index?page=content&id=SB10287
McAfee Security Bulletin – Updates for Linux kernel TCP Sad SACK vulnerability (CVE-2019-11477, CVE-2019-11478, CVE-2019-11479)Third Party Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
kernel/git/davem/net.git - David Miller's networking treeMailing List;Patch;Vendor Advisory
-
https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
Third Party Advisory
-
https://access.redhat.com/security/vulnerabilities/tcpsack
TCP SACK PANIC - Kernel vulnerabilities - CVE-2019-11477, CVE-2019-11478 & CVE-2019-11479 - Red Hat Customer PortalThird Party Advisory
-
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2019/07/06/3
oss-security - Re: linux-distros membership application - MicrosoftMailing List;Third Party Advisory
-
https://www.us-cert.gov/ics/advisories/icsma-20-170-06
BD Alaris PCU | CISAThird Party Advisory;US Government Resource
-
https://www.kb.cert.org/vuls/id/905115
VU#905115 - Multiple TCP Selective Acknowledgement (SACK) and Maximum Segment Size (MSS) networking vulnerabilities may cause denial-of-service conditions in Linux and FreeBSD kernelsThird Party Advisory;US Government Resource
-
http://www.openwall.com/lists/oss-security/2019/06/28/2
oss-security - Re: linux-distros membership application - MicrosoftMailing List;Third Party Advisory
-
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
security-bulletins/2019-001.md at master · Netflix/security-bulletins · GitHubPatch;Third Party Advisory
-
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
Pulse Security Advisory: SA44193 - 2019-06: Out-of-Cycle Advisory: Multiple Linux Kernel and FreeBSD vulnerabilitiesThird Party Advisory
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