CVE-2019-18805

critical

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.

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html

https://security.netapp.com/advisory/ntap-20191205-0001/

https://access.redhat.com/errata/RHSA-2020:0740

Details

Source: MITRE

Published: 2019-11-07

Updated: 2021-06-22

Type: CWE-190

Risk Information

CVSS v2

Base Score: 7.5

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

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL