What is CVE-2019-11479?

CVE-2019-11479 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10. CVE-2019-11479 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2019-11479?

CVE-2019-11479 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2019-11479?

No patch is currently available for CVE-2019-11479. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2019-11479 actively exploited?

CVE-2019-11479 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2019-11479

High

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.

Package Linux Kernel

Published 2019-06-19

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-405

CVE-2019-11479 is classified as CWE-405

See CWE-405 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2019-11479 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Arubanetworks
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt

Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2019/06/28/2

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2019/07/06/3

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2019/07/06/4

Mailing List Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/108818

Third Party Advisory VDB Entry
Red Hat
https://access.redhat.com/errata/RHSA-2019:1594

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2019:1602

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2019:1699

Third Party Advisory
Red Hat
https://access.redhat.com/security/vulnerabilities/tcpsack

Third Party Advisory
Cert-Portal
https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf

Third Party Advisory
Kb
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193

Third Party Advisory
Kc
https://kc.mcafee.com/corporate/index?page=content&id=SB10287

Third Party Advisory
Psirt
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008

Third Party Advisory
Security
https://security.netapp.com/advisory/ntap-20190625-0001/

Third Party Advisory
Support
https://support.f5.com/csp/article/K35421172

Third Party Advisory
Support
https://support.f5.com/csp/article/K35421172?utm_source=f5support&amp%3Butm_medium=RSS
Ubuntu Security
https://usn.ubuntu.com/4041-1/

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/4041-2/

Third Party Advisory
Ubuntu Security
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

Mitigation Third Party Advisory
Kb
https://www.kb.cert.org/vuls/id/905115

Third Party Advisory US Government Resource
Oracle
https://www.oracle.com/security-alerts/cpujan2020.html

Third Party Advisory
Oracle
https://www.oracle.com/security-alerts/cpuoct2020.html
Synology
https://www.synology.com/security/advisory/Synology_SA_19_28

Third Party Advisory
Us-Cert
https://www.us-cert.gov/ics/advisories/icsa-19-253-03

Third Party Advisory US Government Resource
Us-Cert
https://www.us-cert.gov/ics/advisories/icsma-20-170-06

Third Party Advisory US Government Resource
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
Patch
Kernel patch commit
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
Patch

Details

CVE ID CVE-2019-11479

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2019-06-19

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2019-11479?

CVE-2019-11479 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . CVE-2019-11479 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2019-11479?

CVE-2019-11479 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2019-11479?

No patch is currently available for CVE-2019-11479. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2019-11479 actively exploited?

No — CVE-2019-11479 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.