ISOMAN

CVE

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.

Severity
HIGH
CVSS
7.5
Published
Modified
NVD detailAll CVEs

Linked Releases

DistributionReleaseStatusEvidence
Ubuntu18.04.6 amd64 desktopunknownsource
Ubuntu18.04.6 amd64 live-serverunknownsource
Ubuntu16.04.7 amd64 desktopunknownsource
Ubuntu16.04.6 i386 desktopunknownsource
Ubuntu16.04.7 amd64 serverunknownsource
Ubuntu16.04.6 i386 serverunknownsource

References

  1. http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
  2. http://www.openwall.com/lists/oss-security/2019/06/28/2
  3. http://www.openwall.com/lists/oss-security/2019/07/06/3
  4. http://www.openwall.com/lists/oss-security/2019/07/06/4
  5. http://www.securityfocus.com/bid/108818
  6. https://access.redhat.com/errata/RHSA-2019:1594
  7. https://access.redhat.com/errata/RHSA-2019:1602
  8. https://access.redhat.com/errata/RHSA-2019:1699
  9. https://access.redhat.com/security/vulnerabilities/tcpsack
  10. https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
  11. https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
  12. https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
  13. https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
  14. https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
  15. https://kc.mcafee.com/corporate/index?page=content&id=SB10287
  16. https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008
  17. https://security.netapp.com/advisory/ntap-20190625-0001/
  18. https://support.f5.com/csp/article/K35421172
  19. https://support.f5.com/csp/article/K35421172?utm_source=f5support&amp%3Butm_medium=RSS
  20. https://usn.ubuntu.com/4041-1/