CVE-2019-11478 Detail

Current Description

Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. 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 commit f070ef2ac66716357066b683fb0baf55f8191a2e.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score
CNA:  Canonical Ltd.
Base Score:  5.3 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html Third Party Advisory  VDB Entry 
http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
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.openwall.com/lists/oss-security/2019/10/24/1
http://www.openwall.com/lists/oss-security/2019/10/29/3
http://www.vmware.com/security/advisories/VMSA-2019-0010.html
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 Third Party Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=f070ef2ac66716357066b683fb0baf55f8191a2e Mailing List  Patch  Vendor Advisory 
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md Patch  Third Party Advisory 
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193 Third Party Advisory 
https://kc.mcafee.com/corporate/index?page=content&id=SB10287
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0007
https://seclists.org/bugtraq/2019/Jul/30
https://security.netapp.com/advisory/ntap-20190625-0001/
https://support.f5.com/csp/article/K26618426 Third Party Advisory 
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic Mitigation  Third Party Advisory 
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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption cwe source acceptance level NIST  
CWE-770 Allocation of Resources Without Limits or Throttling Reference acceptance level Canonical Ltd.  

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Change History

27 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-11478
NVD Published Date:
06/18/2019
NVD Last Modified:
10/20/2020
Source:
Canonical Ltd.