CVE-2019-18805
published 2019-11-07CVE-2019-18805: 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…
PriorityP340critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
3.43%
87.7th percentile
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.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.2.6-1 (bookworm) | linux 5.2.6-1 (bookworm) |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 0 < 5.2.6-1 | 5.2.6-1 |
| linux | linux_kernel | >= 4.14 < 4.14.115 | 4.14.115 |
| linux | linux_kernel | >= 4.19 < 4.19.38 | 4.19.38 |
| linux | linux_kernel | >= 4.4 < 4.4.180 | 4.4.180 |
| linux | linux_kernel | >= 4.9 < 4.9.172 | 4.9.172 |
| linux | linux_kernel | >= 5.0 < 5.0.11 | 5.0.11 |
| netapp | e-series_santricity_os_controller | 11.0.0 – 11.60.3 | — |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
| redhat | enterprise_linux | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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GHSA
GHSA-wgj3-wxrf-qqg3: An issue was discovered in net/ipv4/sysctl_net_ipv4
ghsa_unreviewed·2022-05-24
CVE-2019-18805 [HIGH] CWE-190 GHSA-wgj3-wxrf-qqg3: An issue was discovered in net/ipv4/sysctl_net_ipv4
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.
OSV
CVE-2019-18805: An issue was discovered in net/ipv4/sysctl_net_ipv4
osv·2019-11-07·CVSS 9.8
CVE-2019-18805 [CRITICAL] CVE-2019-18805: An issue was discovered in net/ipv4/sysctl_net_ipv4
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.
Red Hat
kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c
vendor_redhat·2019-04-16·CVSS 9.8
CVE-2019-18805 [CRITICAL] CWE-190 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c
kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c
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.
A flaw was reported in the Linux kernel's TCP subsystem while calculating a packet round trip time, when a sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) is set incorrectly. This causes an integer overflow which can lead to a denial Of service (DOS) attack.
Mitigation: This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300
Debian
CVE-2019-18805: linux - An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before...
vendor_debian·2019·CVSS 9.8
CVE-2019-18805 [CRITICAL] CVE-2019-18805: linux - An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before...
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.
Scope: local
bookworm: resolved (fixed in 5.2.6-1)
bullseye: resolved (fixed in 5.2.6-1)
forky: resolved (fixed in 5.2.6-1)
sid: resolved (fixed in 5.2.6-1)
trixie: resolved (fixed in 5.2.6-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c [fedora-all]
bugzilla·2019-11-12·CVSS 9.8
CVE-2019-18805 [CRITICAL] CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c [fedora-all]
CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multip
Bugzilla
CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c
bugzilla·2019-11-12·CVSS 9.8
CVE-2019-18805 [CRITICAL] CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c
CVE-2019-18805 kernel: integer overflow in tcp_ack_update_rtt in net/ipv4/tcp_input.c
A flaw was reported in kernel TCP subsystem while calculating a packet round trip time, when a sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) when is set wrongly. This causes an integer over flaw which can lead to a Denial Of Service (DOS) attack.
Additional Information:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1771498]
---
This was fixed for Fedora with the 5.0.11 stable kernel updates.
---
Mitigation:
This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.htmlhttps://access.redhat.com/errata/RHSA-2020:0740https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78https://security.netapp.com/advisory/ntap-20191205-0001/http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.htmlhttps://access.redhat.com/errata/RHSA-2020:0740https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78https://security.netapp.com/advisory/ntap-20191205-0001/
2019-11-07
Published