CVE-2019-11478

MEDIUM

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.

References

http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html

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.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

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=f070ef2ac66716357066b683fb0baf55f8191a2e

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-2019-0007

https://seclists.org/bugtraq/2019/Jul/30

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

https://support.f5.com/csp/article/K26618426

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

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

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

Details

Source: MITRE

Published: 2019-06-19

Updated: 2019-06-20

Type: CWE-400

Risk Information

CVSS v2.0

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH