Integer Overflow or Wraparound Affecting kernel-tools-devel package, versions <0:4.14.123-111.109.amzn2


Severity

Recommended
critical

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
97.17% (100th percentile)

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  • Snyk IDSNYK-AMZN2-KERNELTOOLSDEVEL-1670946
  • published27 Sept 2021
  • disclosed19 Jun 2019

Introduced: 19 Jun 2019

CVE-2019-11477  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel-tools-devel to version 0:4.14.123-111.109.amzn2 or higher.
This issue was patched in ALAS2-2019-1222.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). 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 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.

References

CVSS Scores

version 3.1