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Red Hat: CVE-2019-18805: CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c (Multiple Advisories)

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Red Hat: CVE-2019-18805: CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
Published
11/07/2019
Created
03/12/2020
Added
03/12/2020
Modified
03/13/2024

Description

An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2019-18805
  • RHSA-2020:0740
  • RHSA-2020:1567
  • RHSA-2020:1769

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