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CVE-2019-11479

Good to know:

Date: June 18, 2019

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.

Language: C

Severity Score

7.5

Related Resources (31)

Url: https://support.f5.com/csp/article/K35421172?utm_source=f5support&%3Butm_medium=RSS

Url: https://www.kb.cert.org/vuls/id/905115

Url: https://access.redhat.com/errata/RHSA-2019:1594

Url: https://access.redhat.com/security/cve/CVE-2019-11479

Url: https://access.redhat.com/errata/RHSA-2019:1699

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-11479

Url: https://www.oracle.com/security-alerts/cpuoct2020.html

Url: https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008

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

Url: https://www.us-cert.gov/ics/advisories/icsma-20-170-06

Url: https://www.synology.com/security/advisory/Synology_SA_19_28

Url: https://www.us-cert.gov/ics/advisories/icsa-19-253-03

Url: https://access.redhat.com/errata/RHSA-2019:1602

Url: https://usn.ubuntu.com/4041-1/

Url: http://www.securityfocus.com/bid/108818

Url: https://kc.mcafee.com/corporate/index?page=content&id=SB10287

Url: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363

Url: https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md

Url: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6

Url: http://www.openwall.com/lists/oss-security/2019/06/28/2

Url: https://support.f5.com/csp/article/K35421172

Url: https://security.netapp.com/advisory/ntap-20190625-0001/

Url: https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf

Url: https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

Url: https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193

Url: https://usn.ubuntu.com/4041-2/

Url: https://www.oracle.com/security-alerts/cpujan2020.html

Url: http://www.openwall.com/lists/oss-security/2019/07/06/4

Url: http://www.openwall.com/lists/oss-security/2019/07/06/3

Url: https://access.redhat.com/security/vulnerabilities/tcpsack

Url: https://www.mend.io/vulnerability-database/CVE-2019-11479

Severity Score

7.5

Weakness Type (CWE)

Asymmetric Resource Consumption (Amplification)

CWE-405

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

Upgrade Version

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CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2019-11479

Good to know:

Date: June 18, 2019

Language: C

Severity Score

Related Resources (31)

Severity Score

Weakness Type (CWE)

Top Fix

Upgrade Version

CVSS v3.1

CVSS v2

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